diff --git a/src/js/select2/dropdown.js b/src/js/select2/dropdown.js
index 93d503a5..a6fc40bc 100644
--- a/src/js/select2/dropdown.js
+++ b/src/js/select2/dropdown.js
@@ -25,6 +25,10 @@ define([
     return $dropdown;
   };
 
+  Dropdown.prototype.bind = function () {
+    // Should be implemented in subclasses
+  };
+
   Dropdown.prototype.position = function ($dropdown, $container) {
     // Should be implmented in subclasses
   };