diff --git a/Source/Core/DiscIO/Src/DiscScrubber.cpp b/Source/Core/DiscIO/Src/DiscScrubber.cpp
@@ -7,6 +7,8 @@
 #include "FileUtil.h"
 #include "DiscScrubber.h"
 
+#include <cinttypes>
+
 namespace DiscIO
 {
 
@@ -121,13 +123,13 @@ void GetNextBlock(File::IOFile& in, u8* buffer)
 
 	if (m_isScrubbing && m_FreeTable[i])
 	{
-		DEBUG_LOG(DISCIO, "Freeing 0x%016llx", CurrentOffset);
+		DEBUG_LOG(DISCIO, "Freeing 0x%016" PRIx64, CurrentOffset);
 		std::fill(buffer, buffer + m_BlockSize, 0xFF);
 		in.Seek(m_BlockSize, SEEK_CUR);
 	}
 	else
 	{
-		DEBUG_LOG(DISCIO, "Used    0x%016llx", CurrentOffset);
+		DEBUG_LOG(DISCIO, "Used    0x%016" PRIx64, CurrentOffset);
 		in.ReadBytes(buffer, m_BlockSize);
 	}
 
@@ -150,7 +152,7 @@ void MarkAsUsed(u64 _Offset, u64 _Size)
 	u64 CurrentOffset = _Offset;
 	u64 EndOffset = CurrentOffset + _Size;
 
-	DEBUG_LOG(DISCIO, "Marking 0x%016llx - 0x%016llx as used", _Offset, EndOffset);
+	DEBUG_LOG(DISCIO, "Marking 0x%016" PRIx64 " - 0x%016" PRIx64 " as used", _Offset, EndOffset);
 
 	while ((CurrentOffset < EndOffset) && (CurrentOffset < m_FileSize))
 	{

diff --git a/Source/Core/DiscIO/Src/FileSystemGCWii.cpp b/Source/Core/DiscIO/Src/FileSystemGCWii.cpp
@@ -8,6 +8,7 @@
 #include <string>
 #include <vector>
 #include <algorithm>
+#include <cinttypes>
 
 #include "FileSystemGCWii.h"
 #include "StringUtil.h"
@@ -70,7 +71,7 @@ u64 CFileSystemGCWii::ReadFile(const char* _rFullPath, u8* _pBuffer, size_t _Max
 	if (pFileInfo->m_FileSize > _MaxBufferSize)
 		return 0;
 
-	DEBUG_LOG(DISCIO, "Filename: %s. Offset: %llx. Size: %llx",_rFullPath,
+	DEBUG_LOG(DISCIO, "Filename: %s. Offset: %" PRIx64 ". Size: %" PRIx64, _rFullPath,
 		pFileInfo->m_Offset, pFileInfo->m_FileSize);
 
 	m_rVolume->Read(pFileInfo->m_Offset, pFileInfo->m_FileSize, _pBuffer);

diff --git a/Source/Core/DolphinWX/Src/GameListCtrl.cpp b/Source/Core/DolphinWX/Src/GameListCtrl.cpp
@@ -9,6 +9,7 @@
 #include <wx/filename.h>
 
 #include <algorithm>
+#include <cinttypes>
 #include <memory>
 
 #include "FileSearch.h"
@@ -383,7 +384,7 @@ wxString NiceSizeFormat(u64 _size)
 	auto const value = (_size + unit_size / 2) / unit_size;
 	auto const frac = (_size % unit_size * 10 + unit_size / 2) / unit_size % 10;
 
-	return StrToWxStr(StringFromFormat("%llu.%llu %s", value, frac, unit_symbols[unit]));
+	return StrToWxStr(StringFromFormat("%" PRIu64 ".%" PRIu64 " %s", value, frac, unit_symbols[unit]));
 }
 
 void CGameListCtrl::InsertItemInReportView(long _Index)

diff --git a/Source/Core/DolphinWX/Src/ISOFile.cpp b/Source/Core/DolphinWX/Src/ISOFile.cpp
@@ -188,7 +188,7 @@ std::string GameListItem::CreateCacheFilename()
 
 	// Filename.extension_HashOfFolderPath_Size.cache
 	// Append hash to prevent ISO name-clashing in different folders.
-	Filename.append(StringFromFormat("%s_%x_%llx.cache",
+	Filename.append(StringFromFormat("%s_%x_%zx.cache",
 		extension.c_str(), HashFletcher((const u8 *)LegalPathname.c_str(), LegalPathname.size()),
 		File::GetSize(m_FileName)));
 

diff --git a/Source/Core/DolphinWX/Src/ISOProperties.cpp b/Source/Core/DolphinWX/Src/ISOProperties.cpp
@@ -7,6 +7,7 @@
 #endif
 
 #include <type_traits>
+#include <cinttypes>
 
 #include "Common.h"
 #include "CommonPaths.h"
@@ -118,7 +119,7 @@ CISOProperties::CISOProperties(const std::string fileName, wxWindow* parent, wxW
 		u8 _tTitleID[8];
 		if(OpenISO->GetTitleID(_tTitleID))
 		{
-			snprintf(tmp, 17, "%016llx", Common::swap64(_tTitleID));
+			snprintf(tmp, 17, "%016" PRIx64, Common::swap64(_tTitleID));
 			_iniFilename = tmp;
 		}
 	}

diff --git a/Source/Core/DolphinWX/Src/MemoryCards/WiiSaveCrypted.cpp b/Source/Core/DolphinWX/Src/MemoryCards/WiiSaveCrypted.cpp
@@ -7,12 +7,14 @@
 // Licensed under the terms of the GNU GPL, version 2
 // http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
 
+#include <algorithm>
+#include <cinttypes>
+
 #include "WiiSaveCrypted.h"
 #include "FileUtil.h"
 #include "MathUtil.h"
 #include "NandPaths.h"
 #include "FileUtil.h"
-#include <algorithm>
 
 static Common::replace_v replacements;
 
@@ -152,7 +154,7 @@ void CWiiSaveCrypted::ReadHDR()
 	md5((u8*)&_header, HEADER_SZ, md5_calc);
 	if (memcmp(md5_file, md5_calc, 0x10))
 	{
-		PanicAlertT("MD5 mismatch\n %016llx%016llx != %016llx%016llx", Common::swap64(md5_file),Common::swap64(md5_file+8), Common::swap64(md5_calc), Common::swap64(md5_calc+8));
+		PanicAlertT("MD5 mismatch\n %016" PRIx64 "%016" PRIx64 " != %016" PRIx64 "%016" PRIx64, Common::swap64(md5_file),Common::swap64(md5_file+8), Common::swap64(md5_calc), Common::swap64(md5_calc+8));
 		b_valid= false;
 	}
 
@@ -244,7 +246,7 @@ void CWiiSaveCrypted::ReadBKHDR()
 	if (_sizeOfFiles + FULL_CERT_SZ != _totalSize)
 		WARN_LOG(CONSOLE, "Size(%x) + cert(%x) does not equal totalsize(%x)", _sizeOfFiles, FULL_CERT_SZ, _totalSize);
 	if (m_TitleID != Common::swap64(bkhdr.SaveGameTitle))
-		WARN_LOG(CONSOLE, "Encrypted title (%llx) does not match unencrypted title (%llx)", m_TitleID,  Common::swap64(bkhdr.SaveGameTitle));
+		WARN_LOG(CONSOLE, "Encrypted title (%" PRIx64 ") does not match unencrypted title (%" PRIx64 ")", m_TitleID,  Common::swap64(bkhdr.SaveGameTitle));
 }
 
 void CWiiSaveCrypted::WriteBKHDR()

diff --git a/Source/Core/VideoBackends/D3D/Src/Render.cpp b/Source/Core/VideoBackends/D3D/Src/Render.cpp
@@ -2,7 +2,8 @@
 // Licensed under GPLv2
 // Refer to the license.txt file included.
 
-#include <math.h>
+#include <cinttypes>
+#include <cmath>
 
 #include "Timer.h"
 
@@ -928,7 +929,7 @@ void Renderer::Swap(u32 xfbAddr, u32 fbWidth, u32 fbHeight,const EFBRectangle& r
 	if (SConfig::GetInstance().m_ShowLag)
 	{
 		char lag[10];
-		StringCchPrintfA(lag, 10, "Lag: %llu\n", Movie::g_currentLagCount);
+		StringCchPrintfA(lag, 10, "Lag: %" PRIu64 "\n", Movie::g_currentLagCount);
 		D3D::font.DrawTextScaled(0, 18, 20, 0.0f, 0xFF00FFFF, lag);
 	}
 

diff --git a/Source/Core/VideoBackends/OGL/Src/Render.cpp b/Source/Core/VideoBackends/OGL/Src/Render.cpp
@@ -9,6 +9,7 @@
 #include <vector>
 #include <cmath>
 #include <cstdio>
+#include <cinttypes>
 
 #include "GLUtil.h"
 #if defined(HAVE_WX) && HAVE_WX
@@ -709,7 +710,7 @@ void Renderer::DrawDebugInfo()
 		p+=sprintf(p, "FPS: %d\n", s_fps);
 
 	if (SConfig::GetInstance().m_ShowLag)
-		p+=sprintf(p, "Lag: %llu\n", Movie::g_currentLagCount);
+		p+=sprintf(p, "Lag: %" PRIu64 "\n", Movie::g_currentLagCount);
 
 	if (g_ActiveConfig.bShowInputDisplay)
 		p+=sprintf(p, "%s", Movie::GetInputDisplay().c_str());