diff --git a/common/utils/polyvinyl.js b/common/utils/polyvinyl.js
index 47f1f4b763..18e5b15ea7 100644
--- a/common/utils/polyvinyl.js
+++ b/common/utils/polyvinyl.js
@@ -5,7 +5,7 @@ import castToObservable from '../app/utils/cast-to-observable.js';
 
 
 // createFileStream(
-//   files: List[ PolyVinyl ]
+//   files: [...PolyVinyl]
 // ) => Observable[...Observable[...PolyVinyl]]
 export function createFileStream(files = []) {
   return Observable.of(