diff --git a/ts/core/clean.ts b/ts/core/clean.ts
index 993da66841947bd5d98f8a50232cb6f03cd28c9c..cb4a40ceca59e3f001926dc8c6a79b5ef28aeaef 100644
--- a/ts/core/clean.ts
+++ b/ts/core/clean.ts
@@ -70,4 +70,4 @@ function removeProps(obj, key?, parent?, required?) {
 export default function(obj: any, required?: Array<string>) {
   removeProps(obj, undefined, undefined, required);
   return obj;
-};
+}