@@ -64,12 +64,12 @@
 		}
 		return $this->mFieldNames;
 	}
 
 	function isFieldSortable( $field ) {
-		static $sortable = array( 'img_timestamp', 'img_name', 'img_size' );
-		return in_array( $field, $sortable );
+		global $wgImagelistSortable;
+		return in_array( $field, $wgImagelistSortable );
 	}
 
 	function getQueryInfo() {
 		$fields = $this->getFieldNames();
 		unset( $fields['links'] );