diff --git a/dtool/src/interrogate/interfaceMakerPythonNative.cxx b/dtool/src/interrogate/interfaceMakerPythonNative.cxx
index c09da93ca5..9172e46793 100755
--- a/dtool/src/interrogate/interfaceMakerPythonNative.cxx
+++ b/dtool/src/interrogate/interfaceMakerPythonNative.cxx
@@ -42,7 +42,12 @@ extern std::string EXPORT_IMPORT_PREFEX;
 #define         CLASS_PREFEX  "Dtool_"
 #define         INSTANCE_PREFEX "Dtool_"
 #define         BASE_INSTANCE_NAME "Dtool_PyInstDef"
+
+#ifdef WIN32
+#define MAX_COMMENT_SIZE  1024
+#else
 #define MAX_COMMENT_SIZE  6144
+#endif
 
 
 /////////////////////////////////////////////////////////