diff --git a/Source/Core/InputCommon/ControllerInterface/Android/Android.cpp b/Source/Core/InputCommon/ControllerInterface/Android/Android.cpp
index 50858cd3de24..69f0e5b5ec4f 100644
--- a/Source/Core/InputCommon/ControllerInterface/Android/Android.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/Android/Android.cpp
@@ -23,6 +23,7 @@
 
 #include "InputCommon/ControllerInterface/ControllerInterface.h"
 
+#include "InputCommon/ControllerInterface/InputBackend.h"
 #include "jni/AndroidCommon/AndroidCommon.h"
 #include "jni/AndroidCommon/IDCache.h"
 #include "jni/Input/CoreDevice.h"
@@ -444,6 +445,23 @@ std::shared_ptr<ciface::Core::Device> FindDevice(jint device_id)
 
 namespace ciface::Android
 {
+class InputBackend final : public ciface::InputBackend
+{
+public:
+  using ciface::InputBackend::InputBackend;
+  ~InputBackend();
+  void PopulateDevices() override;
+
+private:
+  void AddDevice(JNIEnv* env, int device_id);
+  void AddSensorDevice(JNIEnv* env);
+};
+
+std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface)
+{
+  return std::make_unique<InputBackend>(controller_interface);
+}
+
 class AndroidInput : public Core::Device::Input
 {
 public:
@@ -885,7 +903,7 @@ void Init()
                             s_controller_interface_register_input_device_listener);
 }
 
-void Shutdown()
+InputBackend::~InputBackend()
 {
   JNIEnv* env = IDCache::GetEnvForThread();
 
@@ -903,7 +921,7 @@ void Shutdown()
   env->DeleteGlobalRef(s_keycodes_array);
 }
 
-static void AddDevice(JNIEnv* env, int device_id)
+void InputBackend::AddDevice(JNIEnv* env, int device_id)
 {
   jobject input_device =
       env->CallStaticObjectMethod(s_input_device_class, s_input_device_get_device, device_id);
@@ -921,7 +939,7 @@ static void AddDevice(JNIEnv* env, int device_id)
   if (device->Inputs().empty() && device->Outputs().empty())
     return;
 
-  g_controller_interface.AddDevice(device);
+  GetControllerInterface().AddDevice(device);
 
   Core::DeviceQualifier qualifier;
   qualifier.FromDevice(device.get());
@@ -936,7 +954,7 @@ static void AddDevice(JNIEnv* env, int device_id)
   env->DeleteLocalRef(j_qualifier);
 }
 
-static void AddSensorDevice(JNIEnv* env)
+void InputBackend::AddSensorDevice(JNIEnv* env)
 {
   // Device sensors (accelerometer, etc.) aren't associated with any Android InputDevice.
   // Create an otherwise empty Dolphin input device so that they have somewhere to live.
@@ -946,7 +964,7 @@ static void AddSensorDevice(JNIEnv* env)
   if (device->Inputs().empty() && device->Outputs().empty())
     return;
 
-  g_controller_interface.AddDevice(device);
+  GetControllerInterface().AddDevice(device);
 
   Core::DeviceQualifier qualifier;
   qualifier.FromDevice(device.get());
@@ -959,7 +977,7 @@ static void AddSensorDevice(JNIEnv* env)
   env->DeleteLocalRef(j_qualifier);
 }
 
-void PopulateDevices()
+void InputBackend::PopulateDevices()
 {
   INFO_LOG_FMT(CONTROLLERINTERFACE, "Android populating devices");
 
diff --git a/Source/Core/InputCommon/ControllerInterface/Android/Android.h b/Source/Core/InputCommon/ControllerInterface/Android/Android.h
index 8b8478d7acd2..e63ac4f2da1d 100644
--- a/Source/Core/InputCommon/ControllerInterface/Android/Android.h
+++ b/Source/Core/InputCommon/ControllerInterface/Android/Android.h
@@ -3,11 +3,10 @@
 
 #pragma once
 
+#include "InputCommon/ControllerInterface/InputBackend.h"
+
 namespace ciface::Android
 {
-void Init();
-void Shutdown();
-
-void PopulateDevices();
+std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface);
 
 }  // namespace ciface::Android
diff --git a/Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp b/Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp
index b7a9c7f307da..ab266292bcd5 100644
--- a/Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/ControllerInterface.cpp
@@ -59,25 +59,25 @@ void ControllerInterface::Initialize(const WindowSystemInfo& wsi)
   m_populating_devices_counter = 1;
 
 #ifdef CIFACE_USE_WIN32
-  ciface::Win32::Init(wsi.render_window);
+  m_input_backends.emplace_back(ciface::Win32::CreateInputBackend(this));
 #endif
 #ifdef CIFACE_USE_XLIB
-// nothing needed
+  m_input_backends.emplace_back(ciface::XInput2::CreateInputBackend(this));
 #endif
 #ifdef CIFACE_USE_OSX
-// nothing needed for Quartz
+  m_input_backends.emplace_back(ciface::Quartz::CreateInputBackend(this));
 #endif
 #ifdef CIFACE_USE_SDL
   m_input_backends.emplace_back(ciface::SDL::CreateInputBackend(this));
 #endif
 #ifdef CIFACE_USE_ANDROID
-  ciface::Android::Init();
+  m_input_backends.emplace_back(ciface::Android::CreateInputBackend(this));
 #endif
 #ifdef CIFACE_USE_EVDEV
   m_input_backends.emplace_back(ciface::evdev::CreateInputBackend(this));
 #endif
 #ifdef CIFACE_USE_PIPES
-// nothing needed
+  m_input_backends.emplace_back(ciface::Pipes::CreateInputBackend(this));
 #endif
 #ifdef CIFACE_USE_DUALSHOCKUDPCLIENT
   m_input_backends.emplace_back(ciface::DualShockUDPClient::CreateInputBackend(this));
@@ -128,22 +128,20 @@ void ControllerInterface::RefreshDevices(RefreshReason reason)
   // or removing them as we are populating them (causing missing or duplicate devices).
   std::lock_guard lk_population(m_devices_population_mutex);
 
-#if defined(CIFACE_USE_WIN32) && !defined(CIFACE_USE_XLIB) && !defined(CIFACE_USE_OSX)
   // If only the window changed, avoid removing and re-adding all devices.
   // Instead only refresh devices that require the window handle.
   if (reason == RefreshReason::WindowChangeOnly)
   {
     m_populating_devices_counter.fetch_add(1);
 
-    // No need to do anything else in this case.
-    // Only (Win32) DInput needs the window handle to be updated.
-    ciface::Win32::ChangeWindow(m_wsi.render_window);
+    for (auto& backend : m_input_backends)
+      backend->HandleWindowChange();
 
     if (m_populating_devices_counter.fetch_sub(1) == 1)
       InvokeDevicesChangedCallbacks();
+
     return;
   }
-#endif
 
   m_populating_devices_counter.fetch_add(1);
 
@@ -159,26 +157,6 @@ void ControllerInterface::RefreshDevices(RefreshReason reason)
   // do it async, to not risk the emulated controllers default config loading not finding a default
   // device.
 
-#ifdef CIFACE_USE_WIN32
-  ciface::Win32::PopulateDevices(m_wsi.render_window);
-#endif
-#ifdef CIFACE_USE_XLIB
-  if (m_wsi.type == WindowSystemType::X11)
-    ciface::XInput2::PopulateDevices(m_wsi.render_window);
-#endif
-#ifdef CIFACE_USE_OSX
-  if (m_wsi.type == WindowSystemType::MacOS)
-  {
-    ciface::Quartz::PopulateDevices(m_wsi.render_window);
-  }
-#endif
-#ifdef CIFACE_USE_ANDROID
-  ciface::Android::PopulateDevices();
-#endif
-#ifdef CIFACE_USE_PIPES
-  ciface::Pipes::PopulateDevices();
-#endif
-
   for (auto& backend : m_input_backends)
     backend->PopulateDevices();
 
@@ -217,19 +195,6 @@ void ControllerInterface::Shutdown()
   // Update control references so shared_ptr<Device>s are freed up BEFORE we shutdown the backends.
   ClearDevices();
 
-#ifdef CIFACE_USE_WIN32
-  ciface::Win32::DeInit();
-#endif
-#ifdef CIFACE_USE_XLIB
-// nothing needed
-#endif
-#ifdef CIFACE_USE_OSX
-  ciface::Quartz::DeInit();
-#endif
-#ifdef CIFACE_USE_ANDROID
-  ciface::Android::Shutdown();
-#endif
-
   // Empty the container of input backends to deconstruct and deinitialize them.
   m_input_backends.clear();
 
@@ -423,6 +388,11 @@ ciface::InputChannel ControllerInterface::GetCurrentInputChannel()
   return tls_input_channel;
 }
 
+WindowSystemInfo ControllerInterface::GetWindowSystemInfo() const
+{
+  return m_wsi;
+}
+
 void ControllerInterface::SetAspectRatioAdjustment(float value)
 {
   m_aspect_ratio_adjustment = value;
diff --git a/Source/Core/InputCommon/ControllerInterface/ControllerInterface.h b/Source/Core/InputCommon/ControllerInterface/ControllerInterface.h
index 837e5135d5b6..d3998a48390e 100644
--- a/Source/Core/InputCommon/ControllerInterface/ControllerInterface.h
+++ b/Source/Core/InputCommon/ControllerInterface/ControllerInterface.h
@@ -122,6 +122,8 @@ class ControllerInterface : public ciface::Core::DeviceContainer
   static void SetCurrentInputChannel(ciface::InputChannel);
   static ciface::InputChannel GetCurrentInputChannel();
 
+  WindowSystemInfo GetWindowSystemInfo() const;
+
 private:
   void ClearDevices();
 
diff --git a/Source/Core/InputCommon/ControllerInterface/InputBackend.cpp b/Source/Core/InputCommon/ControllerInterface/InputBackend.cpp
index 422d7e911c6e..7b52f55caa4d 100644
--- a/Source/Core/InputCommon/ControllerInterface/InputBackend.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/InputBackend.cpp
@@ -16,6 +16,10 @@ void InputBackend::UpdateInput(std::vector<std::weak_ptr<ciface::Core::Device>>&
 {
 }
 
+void InputBackend::HandleWindowChange()
+{
+}
+
 ControllerInterface& InputBackend::GetControllerInterface()
 {
   return m_controller_interface;
diff --git a/Source/Core/InputCommon/ControllerInterface/InputBackend.h b/Source/Core/InputCommon/ControllerInterface/InputBackend.h
index 80ced7e19417..7d7560385120 100644
--- a/Source/Core/InputCommon/ControllerInterface/InputBackend.h
+++ b/Source/Core/InputCommon/ControllerInterface/InputBackend.h
@@ -28,6 +28,8 @@ class InputBackend
   // just add them to the removal list if necessary.
   virtual void UpdateInput(std::vector<std::weak_ptr<ciface::Core::Device>>& devices_to_remove);
 
+  virtual void HandleWindowChange();
+
   ControllerInterface& GetControllerInterface();
 
 private:
diff --git a/Source/Core/InputCommon/ControllerInterface/Pipes/Pipes.cpp b/Source/Core/InputCommon/ControllerInterface/Pipes/Pipes.cpp
index af7ad7dc6fdf..1a2052089eac 100644
--- a/Source/Core/InputCommon/ControllerInterface/Pipes/Pipes.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/Pipes/Pipes.cpp
@@ -39,7 +39,19 @@ static double StringToDouble(const std::string& text)
   return result;
 }
 
-void PopulateDevices()
+class InputBackend final : public ciface::InputBackend
+{
+public:
+  using ciface::InputBackend::InputBackend;
+  void PopulateDevices() override;
+};
+
+std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface)
+{
+  return std::make_unique<InputBackend>(controller_interface);
+}
+
+void InputBackend::PopulateDevices()
 {
   // Search the Pipes directory for files that we can open in read-only,
   // non-blocking mode. The device name is the virtual name of the file.
diff --git a/Source/Core/InputCommon/ControllerInterface/Pipes/Pipes.h b/Source/Core/InputCommon/ControllerInterface/Pipes/Pipes.h
index 53fefd0cb50e..857d5e81285a 100644
--- a/Source/Core/InputCommon/ControllerInterface/Pipes/Pipes.h
+++ b/Source/Core/InputCommon/ControllerInterface/Pipes/Pipes.h
@@ -21,7 +21,7 @@ namespace ciface::Pipes
 // SET {L, R} [0, 1]
 // SET {MAIN, C} [0, 1] [0, 1]
 
-void PopulateDevices();
+std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface);
 
 class PipeDevice : public Core::Device
 {
diff --git a/Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.h b/Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.h
index 8818425344f4..b2c6906e42e9 100644
--- a/Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.h
+++ b/Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.h
@@ -3,8 +3,13 @@
 
 #pragma once
 
+#include <string>
+
+#include "InputCommon/ControllerInterface/InputBackend.h"
+
 namespace ciface::Quartz
 {
-void PopulateDevices(void* window);
-void DeInit();
+std::string GetSourceName();
+
+std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface);
 }  // namespace ciface::Quartz
diff --git a/Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.mm b/Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.mm
index 22dc4074d9aa..5d525958358d 100644
--- a/Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.mm
+++ b/Source/Core/InputCommon/ControllerInterface/Quartz/Quartz.mm
@@ -7,15 +7,40 @@
 
 namespace ciface::Quartz
 {
-void PopulateDevices(void* window)
+std::string GetSourceName()
 {
-  if (!window)
-    return;
+  return "Quartz";
+}
+
+class InputBackend final : public ciface::InputBackend
+{
+public:
+  using ciface::InputBackend::InputBackend;
+  void PopulateDevices() override;
+  void HandleWindowChange() override;
+};
+
+std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface)
+{
+  return std::make_unique<InputBackend>(controller_interface);
+}
+
+void InputBackend::HandleWindowChange()
+{
+  const std::string source_name = GetSourceName();
+  GetControllerInterface().RemoveDevice(
+      [&](const auto* dev) { return dev->GetSource() == source_name; }, true);
 
-  g_controller_interface.AddDevice(std::make_shared<KeyboardAndMouse>(window));
+  PopulateDevices();
 }
 
-void DeInit()
+void InputBackend::PopulateDevices()
 {
+  const WindowSystemInfo wsi = GetControllerInterface().GetWindowSystemInfo();
+  if (wsi.type != WindowSystemType::MacOS)
+    return;
+
+  GetControllerInterface().AddDevice(std::make_shared<KeyboardAndMouse>(wsi.render_window));
 }
+
 }  // namespace ciface::Quartz
diff --git a/Source/Core/InputCommon/ControllerInterface/Quartz/QuartzKeyboardAndMouse.mm b/Source/Core/InputCommon/ControllerInterface/Quartz/QuartzKeyboardAndMouse.mm
index e41c370edf2f..55f212900d7d 100644
--- a/Source/Core/InputCommon/ControllerInterface/Quartz/QuartzKeyboardAndMouse.mm
+++ b/Source/Core/InputCommon/ControllerInterface/Quartz/QuartzKeyboardAndMouse.mm
@@ -12,6 +12,7 @@
 #include "Core/Host.h"
 
 #include "InputCommon/ControllerInterface/ControllerInterface.h"
+#include "InputCommon/ControllerInterface/Quartz/Quartz.h"
 
 /// Helper class to get window position data from threads other than the main thread
 @interface DolWindowPositionObserver : NSObject
@@ -279,7 +280,7 @@ - (void)dealloc
 
 std::string KeyboardAndMouse::GetSource() const
 {
-  return "Quartz";
+  return Quartz::GetSourceName();
 }
 
 ControlState KeyboardAndMouse::Cursor::GetState() const
diff --git a/Source/Core/InputCommon/ControllerInterface/Win32/Win32.cpp b/Source/Core/InputCommon/ControllerInterface/Win32/Win32.cpp
index 21e984796468..36b847aa91f9 100644
--- a/Source/Core/InputCommon/ControllerInterface/Win32/Win32.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/Win32/Win32.cpp
@@ -20,13 +20,25 @@
 
 #pragma comment(lib, "OneCoreUAP.Lib")
 
-// Dolphin's render window
-static HWND s_hwnd;
 static std::mutex s_populate_mutex;
 // TODO is this really needed?
 static Common::Flag s_first_populate_devices_asked;
 static HCMNOTIFICATION s_notify_handle;
 
+namespace ciface::Win32
+{
+class InputBackend final : public ciface::InputBackend
+{
+public:
+  InputBackend(ControllerInterface* controller_interface);
+  ~InputBackend();
+
+  void PopulateDevices() override;
+  void HandleWindowChange() override;
+  HWND GetHWND();
+};
+}  // namespace ciface::Win32
+
 _Pre_satisfies_(EventDataSize >= sizeof(CM_NOTIFY_EVENT_DATA)) static DWORD CALLBACK
     OnDevicesChanged(_In_ HCMNOTIFICATION hNotify, _In_opt_ PVOID Context,
                      _In_ CM_NOTIFY_ACTION Action,
@@ -43,8 +55,9 @@ _Pre_satisfies_(EventDataSize >= sizeof(CM_NOTIFY_EVENT_DATA)) static DWORD CALL
       std::lock_guard lk_population(s_populate_mutex);
       // TODO: we could easily use the message passed alongside this event, which tells
       // whether a device was added or removed, to avoid removing old, still connected, devices
-      g_controller_interface.PlatformPopulateDevices([] {
-        ciface::DInput::PopulateDevices(s_hwnd);
+      g_controller_interface.PlatformPopulateDevices([&] {
+        ciface::DInput::PopulateDevices(
+            static_cast<ciface::Win32::InputBackend*>(Context)->GetHWND());
         ciface::XInput::PopulateDevices();
       });
     }
@@ -52,10 +65,21 @@ _Pre_satisfies_(EventDataSize >= sizeof(CM_NOTIFY_EVENT_DATA)) static DWORD CALL
   return ERROR_SUCCESS;
 }
 
-void ciface::Win32::Init(void* hwnd)
+namespace ciface::Win32
+{
+std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface)
 {
-  s_hwnd = static_cast<HWND>(hwnd);
+  return std::make_unique<InputBackend>(controller_interface);
+}
 
+HWND InputBackend::GetHWND()
+{
+  return static_cast<HWND>(GetControllerInterface().GetWindowSystemInfo().render_window);
+}
+
+InputBackend::InputBackend(ControllerInterface* controller_interface)
+    : ciface::InputBackend(controller_interface)
+{
   XInput::Init();
   WGInput::Init();
 
@@ -63,35 +87,32 @@ void ciface::Win32::Init(void* hwnd)
                                  .FilterType = CM_NOTIFY_FILTER_TYPE_DEVICEINTERFACE,
                                  .u{.DeviceInterface{.ClassGuid = GUID_DEVINTERFACE_HID}}};
   const CONFIGRET cfg_rv =
-      CM_Register_Notification(&notify_filter, nullptr, OnDevicesChanged, &s_notify_handle);
+      CM_Register_Notification(&notify_filter, this, OnDevicesChanged, &s_notify_handle);
   if (cfg_rv != CR_SUCCESS)
   {
     ERROR_LOG_FMT(CONTROLLERINTERFACE, "CM_Register_Notification failed: {:x}", cfg_rv);
   }
 }
 
-void ciface::Win32::PopulateDevices(void* hwnd)
+void InputBackend::PopulateDevices()
 {
-  s_hwnd = static_cast<HWND>(hwnd);
   std::lock_guard lk_population(s_populate_mutex);
   s_first_populate_devices_asked.Set();
-  ciface::DInput::PopulateDevices(s_hwnd);
+  ciface::DInput::PopulateDevices(GetHWND());
   ciface::XInput::PopulateDevices();
   ciface::WGInput::PopulateDevices();
 }
 
-void ciface::Win32::ChangeWindow(void* hwnd)
+void InputBackend::HandleWindowChange()
 {
-  s_hwnd = static_cast<HWND>(hwnd);
   std::lock_guard lk_population(s_populate_mutex);
-  ciface::DInput::ChangeWindow(s_hwnd);
+  ciface::DInput::ChangeWindow(GetHWND());
 }
 
-void ciface::Win32::DeInit()
+InputBackend::~InputBackend()
 {
   s_first_populate_devices_asked.Clear();
   DInput::DeInit();
-  s_hwnd = nullptr;
 
   if (s_notify_handle)
   {
@@ -106,3 +127,5 @@ void ciface::Win32::DeInit()
   XInput::DeInit();
   WGInput::DeInit();
 }
+
+}  // namespace ciface::Win32
diff --git a/Source/Core/InputCommon/ControllerInterface/Win32/Win32.h b/Source/Core/InputCommon/ControllerInterface/Win32/Win32.h
index c842b5c6b5c6..17e46c54b900 100644
--- a/Source/Core/InputCommon/ControllerInterface/Win32/Win32.h
+++ b/Source/Core/InputCommon/ControllerInterface/Win32/Win32.h
@@ -3,10 +3,9 @@
 
 #pragma once
 
+#include "InputCommon/ControllerInterface/InputBackend.h"
+
 namespace ciface::Win32
 {
-void Init(void* hwnd);
-void PopulateDevices(void* hwnd);
-void ChangeWindow(void* hwnd);
-void DeInit();
+std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface);
 }  // namespace ciface::Win32
diff --git a/Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.cpp b/Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.cpp
index f041dd16a144..e4b717e3af33 100644
--- a/Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.cpp
+++ b/Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.cpp
@@ -66,9 +66,38 @@ constexpr int XINPUT_MAJOR = 2, XINPUT_MINOR = 1;
 
 namespace ciface::XInput2
 {
+constexpr std::string_view SOURCE_NAME = "XInput2";
+
+class InputBackend final : public ciface::InputBackend
+{
+public:
+  using ciface::InputBackend::InputBackend;
+  void PopulateDevices() override;
+  void HandleWindowChange() override;
+};
+
+std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface)
+{
+  return std::make_unique<InputBackend>(controller_interface);
+}
+
+void InputBackend::HandleWindowChange()
+{
+  GetControllerInterface().RemoveDevice(
+      [](const auto* dev) { return dev->GetSource() == SOURCE_NAME; }, true);
+
+  PopulateDevices();
+}
+
 // This function will add zero or more KeyboardMouse objects to devices.
-void PopulateDevices(void* const hwnd)
+void InputBackend::PopulateDevices()
 {
+  const WindowSystemInfo wsi = GetControllerInterface().GetWindowSystemInfo();
+  if (wsi.type != WindowSystemType::X11)
+    return;
+
+  const auto hwnd = wsi.render_window;
+
   Display* dpy = XOpenDisplay(nullptr);
 
   // xi_opcode is important; it will be used to identify XInput events by
@@ -119,7 +148,7 @@ void PopulateDevices(void* const hwnd)
       }
       // Since current_master is a master pointer, its attachment must
       // be a master keyboard.
-      g_controller_interface.AddDevice(
+      GetControllerInterface().AddDevice(
           std::make_shared<KeyboardMouse>((Window)hwnd, xi_opcode, current_master->deviceid,
                                           current_master->attachment, scroll_increment));
     }
@@ -382,7 +411,7 @@ std::string KeyboardMouse::GetName() const
 
 std::string KeyboardMouse::GetSource() const
 {
-  return "XInput2";
+  return std::string(SOURCE_NAME);
 }
 
 KeyboardMouse::Key::Key(Display* const display, KeyCode keycode, const char* keyboard)
diff --git a/Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.h b/Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.h
index a8960c1d23fc..427c81b18ad2 100644
--- a/Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.h
+++ b/Source/Core/InputCommon/ControllerInterface/Xlib/XInput2.h
@@ -16,10 +16,11 @@ extern "C" {
 #include "Common/CommonTypes.h"
 #include "Common/Matrix.h"
 #include "InputCommon/ControllerInterface/ControllerInterface.h"
+#include "InputCommon/ControllerInterface/InputBackend.h"
 
 namespace ciface::XInput2
 {
-void PopulateDevices(void* const hwnd);
+std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface);
 
 class KeyboardMouse : public Core::Device
 {