diff --git a/includes/behaviors/openlayers_behavior_boxselect.inc b/includes/behaviors/openlayers_behavior_boxselect.inc
index 93b9a2a..7ece96f 100644
--- a/includes/behaviors/openlayers_behavior_boxselect.inc
+++ b/includes/behaviors/openlayers_behavior_boxselect.inc
@@ -26,7 +26,7 @@ class openlayers_behavior_boxselect extends openlayers_behavior {
     );
   }
 
-  function options_form() {
+  function options_form($defaults) {
     return array(
     );
   }