diff --git a/reaction/code/renderer/qgl.h b/reaction/code/renderer/qgl.h
index a8717e08..8aa4d05c 100644
--- a/reaction/code/renderer/qgl.h
+++ b/reaction/code/renderer/qgl.h
@@ -147,9 +147,9 @@ extern void (APIENTRY * qglGetCompressedTexImageARB)(GLenum target, GLint lod,
 
 // GL_ATI_meminfo
 #ifndef GL_ATI_meminfo
-#define VBO_FREE_MEMORY_ATI                     0x87FB
-#define TEXTURE_FREE_MEMORY_ATI                 0x87FC
-#define RENDERBUFFER_FREE_MEMORY_ATI            0x87FD
+#define GL_VBO_FREE_MEMORY_ATI                     0x87FB
+#define GL_TEXTURE_FREE_MEMORY_ATI                 0x87FC
+#define GL_RENDERBUFFER_FREE_MEMORY_ATI            0x87FD
 #endif