diff --git a/src/sql/hydra.sql b/src/sql/hydra.sql
index e8f958b1..7d73eb4c 100644
--- a/src/sql/hydra.sql
+++ b/src/sql/hydra.sql
@@ -93,8 +93,8 @@ 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))
-        or old.checkInterval != new.checkInterval
-        or old.enabled != new.enabled)
+        or (old.checkInterval != new.checkInterval)
+        or (old.enabled != new.enabled))
   execute procedure notifyJobsetSchedulingChanged();
 
 #endif
diff --git a/src/sql/upgrade-50.sql b/src/sql/upgrade-50.sql
index b394500c..31756791 100644
--- a/src/sql/upgrade-50.sql
+++ b/src/sql/upgrade-50.sql
@@ -7,6 +7,6 @@ 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))
-        or old.checkInterval != new.checkInterval
-        or old.enabled != new.enabled)
+        or (old.checkInterval != new.checkInterval)
+        or (old.enabled != new.enabled))
   execute procedure notifyJobsetSchedulingChanged();