diff --git a/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.cs b/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.cs
index 20487f45..4aec98f3 100644
--- a/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.cs
+++ b/sources/ClangSharp.PInvokeGenerator/PInvokeGenerator.cs
@@ -1137,6 +1137,11 @@ static void GenerateTransparentStructs(PInvokeGenerator generator, Stream? strea
                 {
                     sw.WriteLine('}');
                 }
+
+                if (!leaveStreamOpen)
+                {
+                    stream = null;
+                }
             }
 
             static (int srcSize, int dstSize, int sign) GetSizeAndSignOf(string type)