diff --git a/lib/Db/ShareRequestMapper.php b/lib/Db/ShareRequestMapper.php
index 22a69b63..aa27b090 100644
--- a/lib/Db/ShareRequestMapper.php
+++ b/lib/Db/ShareRequestMapper.php
@@ -43,7 +43,9 @@ class ShareRequestMapper extends Mapper {
      * @return ShareRequest[]
      */
     public function getRequestsByItemGuidGroupedByUser($item_guid){
-        $this->db->executeQuery("SET sql_mode = '';");
+    	if (strtolower($this->db->getDatabasePlatform()->getName()) === 'mysql'){
+    		$this->db->executeQuery("SET sql_mode = '';");
+		}
         $q = "SELECT *, target_user_id FROM *PREFIX*" . self::TABLE_NAME . " WHERE item_guid = ? GROUP BY target_user_id;";
         return $this->findEntities($q, [$item_guid]);
     }