diff --git a/dll/opengl/mesa/attrib.h b/dll/opengl/mesa/attrib.h
index 80df20e6fe6..074f5a3f29a 100644
--- a/dll/opengl/mesa/attrib.h
+++ b/dll/opengl/mesa/attrib.h
@@ -30,7 +30,7 @@
 
 
 #ifndef ATTRIB_H
-#define ATTRIB_h
+#define ATTRIB_H
 
 
 #include "types.h"