diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zap_micro.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zap_micro.c
index ef01c5763f22..c836a3182dc5 100644
--- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zap_micro.c
+++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zap_micro.c
@@ -1435,7 +1435,7 @@ zap_cursor_move_to_key(zap_cursor_t *zc, const char *name, matchtype_t mt)
 
 	if (zc->zc_zap == NULL) {
 		err = zap_lockdir(zc->zc_objset, zc->zc_zapobj, NULL,
-		    RW_READER, TRUE, FALSE, &zc->zc_zap);
+		    RW_READER, TRUE, FALSE, FTAG, &zc->zc_zap);
 		if (err)
 			return (err);
 	} else {