diff --git a/include/linux/input.h b/include/linux/input.h
index 18c98b54303099eec767b2b9b9d7cf4a185f3c76..e02c6a66b2ba74fecdb015b202933541dc3f5257 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -344,7 +344,8 @@ struct input_absinfo {
 #define KEY_BRIGHTNESSUP	225
 #define KEY_MEDIA		226
 
-#define KEY_SWITCHVIDEOMODE	227
+#define KEY_SWITCHVIDEOMODE	227	/* Cycle between available video
+					   outputs (Monitor/LCD/TV-out/etc) */
 #define KEY_KBDILLUMTOGGLE	228
 #define KEY_KBDILLUMDOWN	229
 #define KEY_KBDILLUMUP		230