diff --git a/Xcode/OpenSceneGraph/config/osg/Config b/Xcode/OpenSceneGraph/config/osg/Config
index c98fea853..93b57cc02 100644
--- a/Xcode/OpenSceneGraph/config/osg/Config
+++ b/Xcode/OpenSceneGraph/config/osg/Config
@@ -18,6 +18,7 @@
 #define OSG_GL_DISPLAYLISTS_AVAILABLE
 #define OSG_GL_MATRICES_AVAILABLE
 #define OSG_GL_VERTEX_FUNCS_AVAILABLE
+#define OSG_GL_VERTEX_ARRAY_FUNCS_AVAILABLE
 #define OSG_GL_FIXED_FUNCTION_AVAILABLE
 
 #endif