diff --git a/gralloc/gralloc_priv.h b/gralloc/gralloc_priv.h
index 3330eae..14cb07a 100644
--- a/gralloc/gralloc_priv.h
+++ b/gralloc/gralloc_priv.h
@@ -170,6 +170,8 @@
 	union {
 		int     format;
 		int	req_format; /* same name as gralloc960 */
+		/*unused but referenced in drm_hwc */
+		int	internal_format;
 	};
 	int     stride;
 	union