diff --git a/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.cs b/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.cs
index 07c7af2e..2d5e1010 100644
--- a/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.cs
+++ b/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.cs
@@ -435,6 +435,11 @@ static void GenerateNativeInheritanceAttribute(PInvokeGenerator generator, Strea
             {
                 sw.WriteLine('}');
             }
+
+            if (!leaveStreamOpen)
+            {
+                stream = null;
+            }
         }
 
         static void GenerateNativeTypeNameAttribute(PInvokeGenerator generator, Stream? stream, bool leaveStreamOpen)
@@ -513,6 +518,11 @@ static void GenerateNativeTypeNameAttribute(PInvokeGenerator generator, Stream?
             {
                 sw.WriteLine('}');
             }
+
+            if (!leaveStreamOpen)
+            {
+                stream = null;
+            }
         }
 
         static void GenerateSetsLastSystemErrorAttribute(PInvokeGenerator generator, Stream? stream, bool leaveStreamOpen)
@@ -581,6 +591,11 @@ static void GenerateSetsLastSystemErrorAttribute(PInvokeGenerator generator, Str
             {
                 sw.WriteLine('}');
             }
+
+            if (!leaveStreamOpen)
+            {
+                stream = null;
+            }
         }
 
         static void GenerateVtblIndexAttribute(PInvokeGenerator generator, Stream? stream, bool leaveStreamOpen)
@@ -660,6 +675,11 @@ static void GenerateVtblIndexAttribute(PInvokeGenerator generator, Stream? strea
             {
                 sw.WriteLine('}');
             }
+
+            if (!leaveStreamOpen)
+            {
+                stream = null;
+            }
         }
 
         static void GenerateTransparentStructs(PInvokeGenerator generator, Stream? stream, bool leaveStreamOpen)