diff --git a/plugins/libkolab/lib/kolab_storage_cache.php b/plugins/libkolab/lib/kolab_storage_cache.php
index 651dc18d..c6d1267e 100644
--- a/plugins/libkolab/lib/kolab_storage_cache.php
+++ b/plugins/libkolab/lib/kolab_storage_cache.php
@@ -365,7 +365,7 @@ class kolab_storage_cache
         $this->_read_folder_data();
 
         $result = $this->db->query(
-            "DELETE FROM $this->cache_table WHERE folder_id=?".
+            "DELETE FROM $this->cache_table WHERE folder_id=?",
             $this->folder_id
         );
         return $this->db->affected_rows($result);