diff --git a/sys/contrib/openzfs/module/zfs/dbuf.c b/sys/contrib/openzfs/module/zfs/dbuf.c
--- a/sys/contrib/openzfs/module/zfs/dbuf.c
+++ b/sys/contrib/openzfs/module/zfs/dbuf.c
@@ -1923,7 +1923,7 @@
 		zio_free(db->db_objset->os_spa, txg, bp);
 
 	if (dr->dt.dl.dr_brtwrite) {
-		ASSERT0(dr->dt.dl.dr_data);
+		ASSERT(dr->dt.dl.dr_data == NULL);
 		dr->dt.dl.dr_data = db->db_buf;
 	}
 	dr->dt.dl.dr_override_state = DR_NOT_OVERRIDDEN;