diff --git a/packages/firebase/index.d.ts b/packages/firebase/index.d.ts
index c964087a4d0..e078d6358a3 100644
--- a/packages/firebase/index.d.ts
+++ b/packages/firebase/index.d.ts
@@ -1799,6 +1799,4 @@ declare namespace firebase.firestore {
   }
 }
 
-declare module 'firebase' {
-  export = firebase;
-}
+export = firebase;