diff --git a/types/deep-freeze/index.d.ts b/types/deep-freeze/index.d.ts
index 809db01dfe..2e08d1532a 100644
--- a/types/deep-freeze/index.d.ts
+++ b/types/deep-freeze/index.d.ts
@@ -11,5 +11,5 @@ declare function deepFreeze<T extends Function>(f: T): T;
 declare function deepFreeze<T>(o: T): deepFreeze.DeepReadonly<T>;
 
 declare namespace deepFreeze {
-    export type DeepReadonly<T> = Readonly<{ [P in keyof T]: DeepReadonly<T[P]> }>;
+    type DeepReadonly<T> = Readonly<{ [P in keyof T]: DeepReadonly<T[P]> }>;
 }