diff --git a/Mac/Modules/waste/wastemodule.c b/Mac/Modules/waste/wastemodule.c
index bb442b51f9b..6f8c53dcd35 100644
--- a/Mac/Modules/waste/wastemodule.c
+++ b/Mac/Modules/waste/wastemodule.c
@@ -154,7 +154,7 @@ my_dispose_handler(WEObjectReference objref)
 }
 
 static pascal OSErr
-my_draw_handler(Rect *destRect, WEObjectReference objref)
+my_draw_handler(const Rect *destRect, WEObjectReference objref)
 {
 	PyObject *args=NULL, *rv=NULL;
 	OSErr err;