diff --git a/sources/ClangSharp.PInvokeGenerator/CSharp/CSharpOutputBuilder.VisitDecl.cs b/sources/ClangSharp.PInvokeGenerator/CSharp/CSharpOutputBuilder.VisitDecl.cs
index 5060f29df..fc214b619 100644
--- a/sources/ClangSharp.PInvokeGenerator/CSharp/CSharpOutputBuilder.VisitDecl.cs
+++ b/sources/ClangSharp.PInvokeGenerator/CSharp/CSharpOutputBuilder.VisitDecl.cs
@@ -826,7 +826,7 @@ public void BeginStruct(in StructDesc desc)
 
     public void BeginMarkerInterface(string[]? baseTypeNames)
     {
-        WriteIndented("public interface Interface");
+        WriteIndented("public partial interface Interface");
 
         if (baseTypeNames is not null)
         {
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpCompatibleUnix/CXXMethodDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpCompatibleUnix/CXXMethodDeclarationTest.cs
index 5a3635444..22fb1ccbe 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpCompatibleUnix/CXXMethodDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpCompatibleUnix/CXXMethodDeclarationTest.cs
@@ -633,7 +633,7 @@ public int GetType(int objA, int objB)
             }}
         }}
 
-        public interface Interface
+        public partial interface Interface
         {{
             int GetType(int obj);
 
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpCompatibleWindows/CXXMethodDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpCompatibleWindows/CXXMethodDeclarationTest.cs
index 88bd0b5e8..089347c52 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpCompatibleWindows/CXXMethodDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpCompatibleWindows/CXXMethodDeclarationTest.cs
@@ -628,7 +628,7 @@ public int GetType(int obj)
             }}
         }}
 
-        public interface Interface
+        public partial interface Interface
         {{
             int GetType(int objA, int objB);
 
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpDefaultUnix/CXXMethodDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpDefaultUnix/CXXMethodDeclarationTest.cs
index 9049cd5d6..f2d3692c7 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpDefaultUnix/CXXMethodDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpDefaultUnix/CXXMethodDeclarationTest.cs
@@ -571,7 +571,7 @@ public int GetType(int objA, int objB)
             return lpVtbl->GetType2((MyStruct*)Unsafe.AsPointer(ref this), objA, objB);
         }}
 
-        public interface Interface
+        public partial interface Interface
         {{
             int GetType(int obj);
 
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpDefaultWindows/CXXMethodDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpDefaultWindows/CXXMethodDeclarationTest.cs
index a668f2c15..9158c581a 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpDefaultWindows/CXXMethodDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpDefaultWindows/CXXMethodDeclarationTest.cs
@@ -576,7 +576,7 @@ public int GetType(int obj)
             return lpVtbl->GetType2((MyStruct*)Unsafe.AsPointer(ref this), obj);
         }}
 
-        public interface Interface
+        public partial interface Interface
         {{
             int GetType(int objA, int objB);
 
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpLatestUnix/CXXMethodDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpLatestUnix/CXXMethodDeclarationTest.cs
index 6d422c23d..dbba2f3ab 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpLatestUnix/CXXMethodDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpLatestUnix/CXXMethodDeclarationTest.cs
@@ -571,7 +571,7 @@ public int GetType(int objA, int objB)
             return lpVtbl->GetType2((MyStruct*)Unsafe.AsPointer(ref this), objA, objB);
         }}
 
-        public interface Interface
+        public partial interface Interface
         {{
             int GetType(int obj);
 
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpLatestWindows/CXXMethodDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpLatestWindows/CXXMethodDeclarationTest.cs
index 731613c93..f9e042143 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpLatestWindows/CXXMethodDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpLatestWindows/CXXMethodDeclarationTest.cs
@@ -571,7 +571,7 @@ public int GetType(int obj)
             return lpVtbl->GetType2((MyStruct*)Unsafe.AsPointer(ref this), obj);
         }}
 
-        public interface Interface
+        public partial interface Interface
         {{
             int GetType(int objA, int objB);
 
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpPreviewUnix/CXXMethodDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpPreviewUnix/CXXMethodDeclarationTest.cs
index d0e056f32..18e9f3452 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpPreviewUnix/CXXMethodDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpPreviewUnix/CXXMethodDeclarationTest.cs
@@ -571,7 +571,7 @@ public int GetType(int objA, int objB)
             return lpVtbl->GetType2((MyStruct*)Unsafe.AsPointer(ref this), objA, objB);
         }}
 
-        public interface Interface
+        public partial interface Interface
         {{
             int GetType(int obj);
 
diff --git a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpPreviewWindows/CXXMethodDeclarationTest.cs b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpPreviewWindows/CXXMethodDeclarationTest.cs
index a49a18d3d..3b98b60e9 100644
--- a/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpPreviewWindows/CXXMethodDeclarationTest.cs
+++ b/tests/ClangSharp.PInvokeGenerator.UnitTests/CSharpPreviewWindows/CXXMethodDeclarationTest.cs
@@ -571,7 +571,7 @@ public int GetType(int obj)
             return lpVtbl->GetType2((MyStruct*)Unsafe.AsPointer(ref this), obj);
         }}
 
-        public interface Interface
+        public partial interface Interface
         {{
             int GetType(int objA, int objB);