--- SDL-1.2.15.old/src/video/x11/SDL_x11sym.h
+++ SDL-1.2.15/src/video/x11/SDL_x11sym.h
@@ -163,11 +163,13 @@
  * Not required...these only exist in code in headers on some 64-bit platforms,
  *  and are removed via macros elsewhere, so it's safe for them to be missing.
  */
+#ifdef NOTDEF
 #ifdef LONG64
 SDL_X11_MODULE(IO_32BIT)
 SDL_X11_SYM(int,_XData32,(Display *dpy,register long *data,unsigned len),(dpy,data,len),return)
 SDL_X11_SYM(void,_XRead32,(Display *dpy,register long *data,long len),(dpy,data,len),)
 #endif
+#endif
 
 /*
  * libX11 1.4.99.1 added _XGetRequest, and macros use it behind the scenes.