diff --git a/module/zfs/dsl_dataset.c b/module/zfs/dsl_dataset.c
index 3ee7eac129..a03711ec61 100644
--- a/module/zfs/dsl_dataset.c
+++ b/module/zfs/dsl_dataset.c
@@ -364,7 +364,7 @@ dsl_dataset_get_ref(dsl_pool_t *dp, uint64_t dsobj, void *tag,
 		mutex_init(&ds->ds_opening_lock, NULL, MUTEX_DEFAULT, NULL);
 		mutex_init(&ds->ds_deadlist.bpl_lock, NULL, MUTEX_DEFAULT,
 		    NULL);
-		rw_init(&ds->ds_rwlock, 0, 0, 0);
+		rw_init(&ds->ds_rwlock, NULL, RW_DEFAULT, NULL);
 		cv_init(&ds->ds_exclusive_cv, NULL, CV_DEFAULT, NULL);
 
 		err = bplist_open(&ds->ds_deadlist,