diff --git a/include/linux/input.h b/include/linux/input.h
index a51d6cf..9bd984b 100644
--- a/include/linux/input.h
+++ b/include/linux/input.h
@@ -506,6 +506,7 @@
 #define KEY_VOICEMAIL		0x1ac
 #define KEY_ADDRESSBOOK		0x1ad
 #define KEY_MESSENGER		0x1ae
+#define KEY_DISPLAYTOGGLE	0x1af	/* Turn display (LCD) on and off */
 
 #define KEY_DEL_EOL		0x1c0
 #define KEY_DEL_EOS		0x1c1