diff --git a/src/sql/upgrade-50.sql b/src/sql/upgrade-50.sql
index b19dfa5f..b394500c 100644
--- a/src/sql/upgrade-50.sql
+++ b/src/sql/upgrade-50.sql
@@ -6,7 +6,7 @@ create trigger JobsetsDeleted after delete on Jobsets execute procedure notifyJo
 
 create function notifyJobsetSchedulingChanged() returns trigger as 'begin notify jobset_scheduling_changed; return null; end;' language plpgsql;
 create trigger JobsetSchedulingChanged after update on Jobsets for each row
-  when ((old.triggerTime is distinct from new.triggerTime) and (new.triggerTime is not null))
+  when (((old.triggerTime is distinct from new.triggerTime) and (new.triggerTime is not null))
         or old.checkInterval != new.checkInterval
-        or old.enabled != new.enabled
+        or old.enabled != new.enabled)
   execute procedure notifyJobsetSchedulingChanged();