diff --git a/src/js/select2/data/ajax.js b/src/js/select2/data/ajax.js
index 3309298f..97d34160 100644
--- a/src/js/select2/data/ajax.js
+++ b/src/js/select2/data/ajax.js
@@ -94,7 +94,7 @@ define([
       self._request = $request;
     }
 
-    if (this.ajaxOptions.delay && params.term !== '') {
+    if (this.ajaxOptions.delay && params.term != null) {
       if (this._queryTimeout) {
         window.clearTimeout(this._queryTimeout);
       }