diff --git a/contrib/pg_upgrade/check.c b/contrib/pg_upgrade/check.c
index 9690695fce8c25ede119bf4fd08bfa4a107e285a..93b9e695b731cca50027d03b21812822163cce99 100644
--- a/contrib/pg_upgrade/check.c
+++ b/contrib/pg_upgrade/check.c
@@ -532,7 +532,7 @@ check_for_prepared_transactions(ClusterInfo *cluster)
 
 	res = executeQueryOrDie(conn,
 							"SELECT * "
-							"FROM pg_catalog.pg_prepared_xact()");
+							"FROM pg_catalog.pg_prepared_xacts");
 
 	if (PQntuples(res) != 0)
 		pg_log(PG_FATAL, "The %s cluster contains prepared transactions\n",