diff --git a/model/Concept.php b/model/Concept.php
index 9fa555267..17a2a89a5 100644
--- a/model/Concept.php
+++ b/model/Concept.php
@@ -98,7 +98,7 @@ public function getDeprecated()
    * Returns a label for the concept in the ui language or if not possible in any language.
    * @return string
    */
-  public function getLabel($lang='')
+  public function getLabel()
   {
     $lang = $this->clang;
     // 1. label in current language
@@ -201,8 +201,6 @@ public function getFoundByType()
 
   public function getMappingProperties()
   {
-    $properties = array();
-    $members_array = array();
     $ret = array();
 
     $long_uris = $this->resource->propertyUris();