--- a/include/SDL_surface.h	Sat Aug 31 01:36:38 2013 -0400
+++ b/include/SDL_surface.h	Wed Sep 04 23:40:11 2013 -0400
@@ -357,7 +357,7 @@
  *  surface.
  */
 extern DECLSPEC SDL_Surface *SDLCALL SDL_ConvertSurface
-    (SDL_Surface * src, SDL_PixelFormat * fmt, Uint32 flags);
+    (SDL_Surface * src, const SDL_PixelFormat * fmt, Uint32 flags);
 extern DECLSPEC SDL_Surface *SDLCALL SDL_ConvertSurfaceFormat
     (SDL_Surface * src, Uint32 pixel_format, Uint32 flags);