diff --git a/src/js/select2/data/ajax.js b/src/js/select2/data/ajax.js
index d54b5a58..0b6a6d5e 100644
--- a/src/js/select2/data/ajax.js
+++ b/src/js/select2/data/ajax.js
@@ -10,7 +10,7 @@ define([
       this.processResults = this.ajaxOptions.processResults;
     }
 
-    ArrayAdapter.__super__.constructor.call(this, $element, options);
+    AjaxAdapter.__super__.constructor.call(this, $element, options);
   }
 
   Utils.Extend(AjaxAdapter, ArrayAdapter);