Index: src/surface.c
===================================================================
--- src/surface.c	(revision 2482)
+++ src/surface.c	(working copy)
@@ -1712,7 +1712,7 @@
 
     if (!surf)
         return RAISE (PyExc_SDLError, "display Surface quit");
-    return Py_BuildValue ("(iiii)", surf->format->Rmask, surf->format->Gmask,
+    return Py_BuildValue ("(IIII)", surf->format->Rmask, surf->format->Gmask,
                           surf->format->Bmask, surf->format->Amask);
 }