diff --git a/cogl/gl-prototypes/cogl-all-functions.h b/cogl/gl-prototypes/cogl-all-functions.h
index 870722e40..7d0ed20d1 100644
--- a/cogl/gl-prototypes/cogl-all-functions.h
+++ b/cogl/gl-prototypes/cogl-all-functions.h
@@ -289,7 +289,7 @@ COGL_EXT_END ()
 
 COGL_EXT_BEGIN (map_region, 3, 0,
                 0, /* not in either GLES */
-                "ARB\0",
+                "ARB:\0",
                 "map_buffer_range\0")
 COGL_EXT_FUNCTION (GLvoid *, glMapBufferRange,
                    (GLenum target,