diff --git a/src/pal/inc/rt/objidl.h b/src/pal/inc/rt/objidl.h
index 4586a557cf97..35edbc445b07 100644
--- a/src/pal/inc/rt/objidl.h
+++ b/src/pal/inc/rt/objidl.h
@@ -101,13 +101,6 @@ enum tagSTREAM_SEEK
 	STREAM_SEEK_END	= 2
     } 	STREAM_SEEK;
 
-typedef 
-enum tagLOCKTYPE
-    {	LOCK_WRITE	= 1,
-	LOCK_EXCLUSIVE	= 2,
-	LOCK_ONLYONCE	= 4
-    } 	LOCKTYPE;
-
 typedef 
 enum tagSTATFLAG
     {	STATFLAG_DEFAULT	= 0,