diff --git a/Definitions/jquery-1.8.d.ts b/Definitions/jquery-1.8.d.ts
index 8aa46adc8d..7c87c1c044 100644
--- a/Definitions/jquery-1.8.d.ts
+++ b/Definitions/jquery-1.8.d.ts
@@ -419,6 +419,7 @@ interface JQuery {
     /*******
      EFFECTS
     ********/
+    animate(properties: any, duration?: any, complete?: Function): JQuery;
     animate(properties: any, duration?: any, easing?: string, complete?: Function): JQuery;
     animate(properties: any, options: { duration?: any; easing?: string; complete?: Function; step?: Function; queue?: bool; specialEasing?: any; });