Index: head/sys/boot/zfs/zfsimpl.c
===================================================================
--- head/sys/boot/zfs/zfsimpl.c
+++ head/sys/boot/zfs/zfsimpl.c
@@ -2122,8 +2122,13 @@
 	    &dir)) != 0)
 		return (rc);
 	if ((rc = zap_lookup(spa, &dir, DMU_POOL_FEATURES_FOR_READ,
-	    sizeof (objnum), 1, &objnum)) != 0)
-		return (rc);
+	    sizeof (objnum), 1, &objnum)) != 0) {
+		/*
+		 * It is older pool without features. As we have already
+		 * tested the label, just return without raising the error.
+		 */
+		return (0);
+	}
 
 	if ((rc = objset_get_dnode(spa, &spa->spa_mos, objnum, &dir)) != 0)
 		return (rc);