diff --git a/library/Icingadb/Model/Hostgroupsummary.php b/library/Icingadb/Model/Hostgroupsummary.php
index 68c4a3e6b..270983127 100644
--- a/library/Icingadb/Model/Hostgroupsummary.php
+++ b/library/Icingadb/Model/Hostgroupsummary.php
@@ -107,8 +107,8 @@ public function getUnions()
                 ],
                 [
                     'hostgroup_id'           => 'hostgroup.id',
-                    'hostgroup_name'         => new Expression('NULL'),
-                    'hostgroup_display_name' => new Expression('NULL'),
+                    'hostgroup_name'         => 'hostgroup.name',
+                    'hostgroup_display_name' => 'hostgroup.display_name',
                     'host_id'                => 'host.id',
                     'host_state'             => 'state.soft_state',
                     'host_handled'           => 'state.is_handled',
@@ -126,8 +126,8 @@ public function getUnions()
                 ],
                 [
                     'hostgroup_id'           => 'hostgroup.id',
-                    'hostgroup_name'         => new Expression('NULL'),
-                    'hostgroup_display_name' => new Expression('NULL'),
+                    'hostgroup_name'         => 'hostgroup.name',
+                    'hostgroup_display_name' => 'hostgroup.display_name',
                     'host_id'                => new Expression('NULL'),
                     'host_state'             => new Expression('NULL'),
                     'host_handled'           => new Expression('NULL'),
diff --git a/library/Icingadb/Model/ServicegroupSummary.php b/library/Icingadb/Model/ServicegroupSummary.php
index 1b5232ce3..5681f7995 100644
--- a/library/Icingadb/Model/ServicegroupSummary.php
+++ b/library/Icingadb/Model/ServicegroupSummary.php
@@ -83,8 +83,8 @@ public function getUnions()
                 ],
                 [
                     'servicegroup_id'           => 'servicegroup.id',
-                    'servicegroup_name'         => new Expression('NULL'),
-                    'servicegroup_display_name' => new Expression('NULL'),
+                    'servicegroup_name'         => 'servicegroup.name',
+                    'servicegroup_display_name' => 'servicegroup.display_name',
                     'service_id'                => 'service.id',
                     'service_state'             => 'state.soft_state',
                     'service_handled'           => 'state.is_handled',