diff --git a/client/src/app/helpers/utils/date.ts b/client/src/app/helpers/utils/date.ts
index 75363cc81..26702d487 100644
--- a/client/src/app/helpers/utils/date.ts
+++ b/client/src/app/helpers/utils/date.ts
@@ -41,7 +41,7 @@ function durationToString (duration: number) {
 }
 
 export {
-  DateFormat,
+  type DateFormat,
 
   durationToString,
   dateToHuman