diff --git a/code/nel/src/3d/driver/opengl/stdopengl.h b/code/nel/src/3d/driver/opengl/stdopengl.h
index 2167324f0..3066a778a 100644
--- a/code/nel/src/3d/driver/opengl/stdopengl.h
+++ b/code/nel/src/3d/driver/opengl/stdopengl.h
@@ -101,9 +101,9 @@
 #include "nel/3d/index_buffer.h"
 
 #ifdef NL_OS_MAC
+#include <AvailabilityMacros.h>
 #if defined(MAC_OS_X_VERSION_10_6) && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_6
 #define NL_MAC_VERSION_10_6_UP
-#else
 #endif
 #endif