diff --git a/react-router/react-router.d.ts b/react-router/react-router.d.ts
index 07acd52b9e..80d2e4ee6d 100644
--- a/react-router/react-router.d.ts
+++ b/react-router/react-router.d.ts
@@ -250,6 +250,7 @@ declare namespace ReactRouter {
         location?: H.Location | string
         parseQueryString?: ParseQueryString
         stringifyQuery?: StringifyQuery
+        basename?: string
     }
     interface MatchState extends RouterState {
         history: History