diff --git a/src/mesa/x86/gen_matypes.c b/src/mesa/x86/gen_matypes.c
index fc06dc7ea97..5b74c2af839 100644
--- a/src/mesa/x86/gen_matypes.c
+++ b/src/mesa/x86/gen_matypes.c
@@ -32,10 +32,6 @@
  * Mesa, including lighting, clipping, texture image conversion etc.
  */
 
-#ifndef __STDC_FORMAT_MACROS
-#define __STDC_FORMAT_MACROS
-#endif
-
 #include <stdio.h>
 #include <inttypes.h>