diff --git a/application/views/helpers/FormDataFilter.php b/application/views/helpers/FormDataFilter.php
index 169e1c68..a348b737 100644
--- a/application/views/helpers/FormDataFilter.php
+++ b/application/views/helpers/FormDataFilter.php
@@ -154,7 +154,9 @@ class Zend_View_Helper_FormDataFilter extends Zend_View_Helper_FormElement
         if ($filter) {
             // TODO: Make this configurable
             $type = 'host';
+            $filter = clone($filter);
 
+            $filter->setExpression(json_decode($filter->getExpression()));
             $dummy = IcingaObject::createByType($type);
             $col = $filter->getColumn();
             if ($dummy->hasProperty($col)) {
diff --git a/library/Director/Web/Form/Element/DataFilter.php b/library/Director/Web/Form/Element/DataFilter.php
index 2c45d4b2..c75fdee3 100644
--- a/library/Director/Web/Form/Element/DataFilter.php
+++ b/library/Director/Web/Form/Element/DataFilter.php
@@ -231,7 +231,7 @@ class DataFilter extends FormElement
             return Filter::expression(
                 $entry['column'],
                 '=',
-                true
+                json_encode(true)
             );
         } elseif ($entry['sign'] === 'in') {
             if (array_key_exists('value', $entry)) {
@@ -248,13 +248,15 @@ class DataFilter extends FormElement
             return Filter::expression(
                 $entry['column'],
                 '=',
-                $value
+                json_encode($value)
             );
         } else {
+            $value = array_key_exists('value', $entry) ? $entry['value'] : null;
+
             return Filter::expression(
                 $entry['column'],
                 $entry['sign'],
-                array_key_exists('value', $entry) ? $entry['value'] : null
+                json_encode($value)
             );
         }
     }