diff --git fglrx/common/lib/modules/fglrx/build_mod/firegl_public.c fglrx/common/lib/modules/fglrx/build_mod/firegl_public.c
--- fglrx/common/lib/modules/fglrx/build_mod/firegl_public.c
+++ fglrx/common/lib/modules/fglrx/build_mod/firegl_public.c
@@ -1722,6 +1722,9 @@ void ATI_API_CALL KCL_SetCurrentProcessS
 
 #if defined(__i386__) 
 #ifndef __HAVE_ARCH_CMPXCHG
+#ifndef __xg
+#define __xg(x) ((volatile long *)(x))
+#endif
 static inline 
 unsigned long __fgl_cmpxchg(volatile void *ptr, unsigned long old,            
                         unsigned long new, int size)