diff --git a/select2/select2-tests.ts b/select2/select2-tests.ts
index 2ab6e94af..ab1618dbe 100644
--- a/select2/select2-tests.ts
+++ b/select2/select2-tests.ts
@@ -99,7 +99,7 @@ $("#e7").select2({
     ajax: {
         url: "http://api.rottentomatoes.com/api/public/v1.0/movies.json",
         dataType: 'jsonp',
-        quietMillis: 100,
+        delay: 100,
         data: function (term, page) {
             return {
                 q: term,
diff --git a/select2/select2.d.ts b/select2/select2.d.ts
index aea144f00..f71c0a5b9 100644
--- a/select2/select2.d.ts
+++ b/select2/select2.d.ts
@@ -25,7 +25,7 @@ interface Select2AjaxOptions {
     */
     url?: any;
     dataType?: string;
-    quietMillis?: number;
+    delay?: number;
     cache?: boolean;
     data?: (term: string, page: number, context: any) => any;
     results?: (term: any, page: number, context: any) => any;