diff --git a/fullCalendar/fullCalendar.d.ts b/fullCalendar/fullCalendar.d.ts
index 65df012185..fd43e51c5f 100644
--- a/fullCalendar/fullCalendar.d.ts
+++ b/fullCalendar/fullCalendar.d.ts
@@ -318,7 +318,7 @@ interface JQuery {
     /**
      * Moves the calendar to an arbitrary date.
      */
-    fullCalendar(method: 'gotoDate', date: Date | string): void;
+    fullCalendar(method: 'gotoDate', date: moment.Moment | Date | string): void;
 
     /**
      * Moves the calendar forward/backward an arbitrary amount of time.
@@ -403,4 +403,4 @@ interface JQuery {
 
 interface JQueryStatic {
     fullCalendar: FullCalendar.Calendar;
-}
\ No newline at end of file
+}