diff --git a/types/react-big-calendar/index.d.ts b/types/react-big-calendar/index.d.ts
index de628a6174..53dbea4d90 100644
--- a/types/react-big-calendar/index.d.ts
+++ b/types/react-big-calendar/index.d.ts
@@ -298,6 +298,7 @@ export interface BigCalendarProps<TEvent extends Event = Event, TResource extend
     defaultDate?: Date;
     className?: string;
     elementProps?: React.HTMLAttributes<HTMLElement>;
+    onShowMore?: (events: TEvent[], date: Date) => void;
 }
 
 export interface ViewStatic {
diff --git a/types/react-big-calendar/react-big-calendar-tests.tsx b/types/react-big-calendar/react-big-calendar-tests.tsx
index 5e895c2b60..98d9555b61 100644
--- a/types/react-big-calendar/react-big-calendar-tests.tsx
+++ b/types/react-big-calendar/react-big-calendar-tests.tsx
@@ -135,6 +135,9 @@ class CalendarResource {
               toolbar={true}
               popup={true}
               popupOffset={20}
+              onShowMore={(events, date) => {
+                  console.log('onShowMore fired, events: %O, date: %O', events, date);
+              }}
               selectable={true}
               step={20}
               rtl={true}