diff --git a/types/react-router/index.d.ts b/types/react-router/index.d.ts
index 34092d84b7..4b0f45853f 100644
--- a/types/react-router/index.d.ts
+++ b/types/react-router/index.d.ts
@@ -68,7 +68,7 @@ export interface RouteComponentProps<P, C extends StaticContext = StaticContext>
   history: H.History;
   location: H.Location;
   match: match<P>;
-  staticContext: C | undefined;
+  staticContext?: C;
 }
 
 export interface RouteProps {