diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 6bfaa76..b2e1331 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -1132,6 +1132,7 @@
 #define V4L2_CTRL_FLAG_NEXT_CTRL	0x80000000
 
 /*  User-class control IDs defined by V4L2 */
+#define V4L2_CID_MAX_CTRLS		1024
 #define V4L2_CID_BASE			(V4L2_CTRL_CLASS_USER | 0x900)
 #define V4L2_CID_USER_BASE 		V4L2_CID_BASE
 /*  IDs reserved for driver specific controls */