diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c
index 5ffb712..d959142 100644
--- a/src/backend/utils/adt/ruleutils.c
+++ b/src/backend/utils/adt/ruleutils.c
@@ -1332,7 +1332,7 @@ pg_get_constraintdef_worker(Oid constraintId, bool fullCommand,

 	UnregisterSnapshot(snapshot);

-	if (!HeapTupleIsValid(tup)) /* should not happen */
+	if (!HeapTupleIsValid(tup))
 		elog(ERROR, "cache lookup failed for constraint %u", constraintId);

 	conForm = (Form_pg_constraint) GETSTRUCT(tup);