diff --git a/Assets/Samples/InGameHints/InGameHintsActions.cs b/Assets/Samples/InGameHints/InGameHintsActions.cs
index 5c880a15b2..4bd926e78d 100644
--- a/Assets/Samples/InGameHints/InGameHintsActions.cs
+++ b/Assets/Samples/InGameHints/InGameHintsActions.cs
@@ -14,7 +14,6 @@
 using System.Collections.Generic;
 using UnityEngine.InputSystem;
 using UnityEngine.InputSystem.Utilities;
-using UnityEngine;
 
 namespace UnityEngine.InputSystem.Samples.InGameHints
 {
@@ -275,7 +274,7 @@ public @InGameHintsActions()
 
         ~@InGameHintsActions()
         {
-            Debug.Assert(!m_Gameplay.enabled, "This will cause a leak and performance issues, InGameHintsActions.Gameplay.Disable() has not been called.");
+            UnityEngine.Debug.Assert(!m_Gameplay.enabled, "This will cause a leak and performance issues, InGameHintsActions.Gameplay.Disable() has not been called.");
         }
 
         public void Dispose()
diff --git a/Assets/Samples/SimpleDemo/SimpleControls.cs b/Assets/Samples/SimpleDemo/SimpleControls.cs
index 279e3117eb..cb5972b685 100644
--- a/Assets/Samples/SimpleDemo/SimpleControls.cs
+++ b/Assets/Samples/SimpleDemo/SimpleControls.cs
@@ -14,7 +14,6 @@
 using System.Collections.Generic;
 using UnityEngine.InputSystem;
 using UnityEngine.InputSystem.Utilities;
-using UnityEngine;
 
 public partial class @SimpleControls: IInputActionCollection2, IDisposable
 {
@@ -170,7 +169,7 @@ public @SimpleControls()
 
     ~@SimpleControls()
     {
-        Debug.Assert(!m_gameplay.enabled, "This will cause a leak and performance issues, SimpleControls.gameplay.Disable() has not been called.");
+        UnityEngine.Debug.Assert(!m_gameplay.enabled, "This will cause a leak and performance issues, SimpleControls.gameplay.Disable() has not been called.");
     }
 
     public void Dispose()
diff --git a/Assets/Tests/InputSystem/InputActionCodeGeneratorActions.cs b/Assets/Tests/InputSystem/InputActionCodeGeneratorActions.cs
index b4dc55fafd..47989e5de4 100644
--- a/Assets/Tests/InputSystem/InputActionCodeGeneratorActions.cs
+++ b/Assets/Tests/InputSystem/InputActionCodeGeneratorActions.cs
@@ -14,7 +14,6 @@
 using System.Collections.Generic;
 using UnityEngine.InputSystem;
 using UnityEngine.InputSystem.Utilities;
-using UnityEngine;
 
 public partial class @InputActionCodeGeneratorActions: IInputActionCollection2, IDisposable
 {
@@ -83,7 +82,7 @@ public @InputActionCodeGeneratorActions()
 
     ~@InputActionCodeGeneratorActions()
     {
-        Debug.Assert(!m_gameplay.enabled, "This will cause a leak and performance issues, InputActionCodeGeneratorActions.gameplay.Disable() has not been called.");
+        UnityEngine.Debug.Assert(!m_gameplay.enabled, "This will cause a leak and performance issues, InputActionCodeGeneratorActions.gameplay.Disable() has not been called.");
     }
 
     public void Dispose()
diff --git a/Packages/com.unity.inputsystem/CHANGELOG.md b/Packages/com.unity.inputsystem/CHANGELOG.md
index c7175a3c70..bb22477046 100644
--- a/Packages/com.unity.inputsystem/CHANGELOG.md
+++ b/Packages/com.unity.inputsystem/CHANGELOG.md
@@ -13,6 +13,7 @@ however, it has to be formatted properly to pass verification tests.
 ### Fixed
 - Fixed default scroll speed in uGUI being slower than before. [ISXB-766](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-766)
 - Fixed an issue when multiple interactions drive an action and perform during the cancelation of the current active interaction [ISXB-310](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-310).
+- Fixed an issue when generating C# class of Input Actions that contain an action map named `Debug` [ISXB-851](https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-851).
 
 ### Added
 - Added `InputSystemUIInputModule.scrollDeltaPerTick` property, a customizable multiplicative factor applied to the scroll wheel speed before it is sent to UI components. Note that this has no effect on UI Toolkit content, only uGUI.
diff --git a/Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter/InputActionCodeGenerator.cs b/Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter/InputActionCodeGenerator.cs
index 1e45e37632..dab46023da 100644
--- a/Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter/InputActionCodeGenerator.cs
+++ b/Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter/InputActionCodeGenerator.cs
@@ -83,7 +83,6 @@ public static string GenerateWrapperCode(InputActionAsset asset, Options options
             writer.WriteLine("using System.Collections.Generic;");
             writer.WriteLine("using UnityEngine.InputSystem;");
             writer.WriteLine("using UnityEngine.InputSystem.Utilities;");
-            writer.WriteLine("using UnityEngine;");
             writer.WriteLine("");
 
             // Begin namespace.
@@ -127,7 +126,7 @@ public static string GenerateWrapperCode(InputActionAsset asset, Options options
             foreach (var map in maps)
             {
                 var mapName = CSharpCodeHelpers.MakeIdentifier(map.name);
-                writer.WriteLine($"Debug.Assert(!m_{mapName}.enabled, \"This will cause a leak and performance issues, {options.className}.{mapName}.Disable() has not been called.\");");
+                writer.WriteLine($"UnityEngine.Debug.Assert(!m_{mapName}.enabled, \"This will cause a leak and performance issues, {options.className}.{mapName}.Disable() has not been called.\");");
             }
             writer.EndBlock();
             writer.WriteLine();