diff --git a/src/FileTypes.d.ts b/src/FileTypes.d.ts
index c5721ea..43dd78f 100644
--- a/src/FileTypes.d.ts
+++ b/src/FileTypes.d.ts
@@ -12,3 +12,7 @@ declare module "*.pdf" {
   const src: string;
   export default src;
 }
+
+interface Window {
+  MSStream?: any;
+}