diff --git a/sys/sys/lockmgr.h b/sys/sys/lockmgr.h
index cdd825b1e7b8..5f9a279ba1c8 100644
--- a/sys/sys/lockmgr.h
+++ b/sys/sys/lockmgr.h
@@ -144,7 +144,6 @@ struct lock {
 				    * lk_interlock
 				    */
 #define LK_RETRY	0x00020000 /* vn_lock: retry until locked */
-#define	LK_THISLAYER	0x00040000 /* vn_lock: lock/unlock only current layer */
 #define	LK_INTERNAL	0x00080000/* The internal lock is already held */
 
 /*