diff --git a/src/Oro/Bundle/FilterBundle/Filter/DateGroupingFilter.php b/src/Oro/Bundle/FilterBundle/Filter/DateGroupingFilter.php
index 8e1226fa1d6..5d0bc19570f 100644
--- a/src/Oro/Bundle/FilterBundle/Filter/DateGroupingFilter.php
+++ b/src/Oro/Bundle/FilterBundle/Filter/DateGroupingFilter.php
@@ -167,6 +167,9 @@ protected function handleCalendarDateSelect(QueryBuilder $qb, $filterType)
         foreach ($selects as $select) {
             $qb->add('select', $select, true);
         }
+
+        // Add groupBy without cast , required for postgres
+        $qb->addGroupBy($configDataName);
     }
 
     /**