diff --git a/modules/monitoring/application/controllers/AcknowledgementController.php b/modules/monitoring/application/controllers/AcknowledgementController.php
index 55e003c49..684111fde 100644
--- a/modules/monitoring/application/controllers/AcknowledgementController.php
+++ b/modules/monitoring/application/controllers/AcknowledgementController.php
@@ -31,7 +31,6 @@ class Monitoring_AcknowledgementController extends Controller
                 'acknowledgement_id',
                 'instance_id',
                 'entry_time',
-                'acknowledgement_type',
                 'object_id',
                 'state',
                 'author_name',
diff --git a/modules/monitoring/application/views/scripts/acknowledgement/index.phtml b/modules/monitoring/application/views/scripts/acknowledgement/index.phtml
index 83d41e4c1..42ccc262e 100644
--- a/modules/monitoring/application/views/scripts/acknowledgement/index.phtml
+++ b/modules/monitoring/application/views/scripts/acknowledgement/index.phtml
@@ -9,7 +9,7 @@ use Icinga\Module\Monitoring\Object\Host;
   <div class="dontprint">
      <?= $this->render('list/components/selectioninfo.phtml'); ?>
   </div>
-    <h1><?= $this->translate('Acknowledgements') ?></h1>
+    <h1><?= count($acknowledgements) ?> <?= $this->translate('Acknowledgements') ?></h1>
     <?= $this->sortBox; ?>
     <?= $this->limiter; ?>
     <?= $this->paginator; ?>
diff --git a/modules/monitoring/library/Monitoring/Backend/Ido/Query/AcknowledgementQuery.php b/modules/monitoring/library/Monitoring/Backend/Ido/Query/AcknowledgementQuery.php
index 77782ec09..ac46fd36a 100644
--- a/modules/monitoring/library/Monitoring/Backend/Ido/Query/AcknowledgementQuery.php
+++ b/modules/monitoring/library/Monitoring/Backend/Ido/Query/AcknowledgementQuery.php
@@ -18,7 +18,6 @@ class AcknowledgementQuery extends IdoQuery
             'acknowledgement_id'   => 'a.acknowledgement_id',
             'instance_id'          => 'a.instance_id',
             'entry_time'           => 'UNIX_TIMESTAMP(a.entry_time)',
-            'acknowledgement_type' => 'IF (a.acknowledgement_type = 0, \'host\', \'service\')',
             'object_id'            => 'a.object_id',
             'state'                => 'a.state',
             'author_name'          => 'a.author_name',
@@ -31,9 +30,9 @@ class AcknowledgementQuery extends IdoQuery
             'endpoint_object_id'   => 'a.endpoint_object_id'
         ),
         'objects' => array(
-            'acknowledgement_is_service' => 'IF (o.objecttype_id = 2, 1, 0)',
-            'host'                 => 'o.name1',
-            'service'              => 'o.name2'
+            'acknowledgement_is_service' => '(CASE WHEN o.objecttype_id = 2 THEN 1 ELSE 0 END)',
+            'host'                       => 'o.name1',
+            'service'                    => 'o.name2'
         )
     );
 
@@ -67,8 +66,8 @@ class AcknowledgementQuery extends IdoQuery
         $this->select->join(
             array('a' => $ackTable),
             'o.object_id = a.object_id ' .
-            'AND ((o.objecttype_id = 2 AND ss.problem_has_been_acknowledged AND ss.acknowledgement_type = 2) ' .
-            '  OR (o.objecttype_id = 1 AND hs.problem_has_been_acknowledged AND hs.acknowledgement_type = 2)) ' .
+            'AND ((o.objecttype_id = 2 AND ss.problem_has_been_acknowledged = 1 AND ss.acknowledgement_type = 2) ' .
+            '  OR (o.objecttype_id = 1 AND hs.problem_has_been_acknowledged = 1 AND hs.acknowledgement_type = 2)) ' .
             'AND o.is_active = 1 AND a.acknowledgement_id = ' . $subQuery,
             array()
         );
diff --git a/modules/monitoring/library/Monitoring/DataView/Acknowledgement.php b/modules/monitoring/library/Monitoring/DataView/Acknowledgement.php
index 2ed457af4..fb3bb85df 100644
--- a/modules/monitoring/library/Monitoring/DataView/Acknowledgement.php
+++ b/modules/monitoring/library/Monitoring/DataView/Acknowledgement.php
@@ -17,7 +17,6 @@ class Acknowledgement extends DataView
             'acknowledgement_id',
             'instance_id',
             'entry_time',
-            'acknowledgement_type',
             'object_id',
             'state',
             'author_name',
@@ -39,7 +38,6 @@ class Acknowledgement extends DataView
         return array(
             'acknowledgement_id',
             'entry_time',
-            'acknowledgement_type',
             'state',
             'author_name',
             'comment_data',