diff --git a/ext/src/global.d.ts b/ext/src/global.d.ts
index 48b21c1..6e8535a 100644
--- a/ext/src/global.d.ts
+++ b/ext/src/global.d.ts
@@ -19,7 +19,7 @@ interface CloneIntoOptions {
 
 declare function cloneInto<T> (
         obj: T
-      , targetScope: any
+      , targetScope: Window
       , options?: CloneIntoOptions): T;