diff --git a/source/blender/python/api2_2x/gen_utils.h b/source/blender/python/api2_2x/gen_utils.h
index 7b64944a6da..d0e618635a5 100644
--- a/source/blender/python/api2_2x/gen_utils.h
+++ b/source/blender/python/api2_2x/gen_utils.h
@@ -44,6 +44,15 @@
 #define Py_WRAP 1024
 #define Py_NEW  2048
 
+/* 
+   Py_RETURN_NONE
+   Python 2.4 macro.  
+   defined here until we switch to 2.4
+*/
+#ifndef Py_RETURN_NONE
+#define Py_RETURN_NONE  Py_INCREF( Py_None ); return Py_None 
+#endif
+
 int EXPP_FloatsAreEqual(float A, float B, int floatSteps);
 int EXPP_VectorsAreEqual(float *vecA, float *vecB, int size, int floatSteps);