diff --git a/src/backend/catalog/objectaddress.c b/src/backend/catalog/objectaddress.c
index b0ff255a593..9520059c3d5 100644
--- a/src/backend/catalog/objectaddress.c
+++ b/src/backend/catalog/objectaddress.c
@@ -1574,8 +1574,8 @@ get_object_address_opf_member(ObjectType objtype,
 	ObjectAddress address;
 	ListCell   *cell;
 	List	   *copy;
-	TypeName   *typenames[2];
-	Oid			typeoids[2];
+	TypeName   *typenames[2] = { NULL, NULL };
+	Oid			typeoids[2] = { InvalidOid, InvalidOid };
 	int			membernum;
 	int			i;