diff --git a/src/y-webrtc/index.js b/src/y-webrtc/index.js
index edd506d820cec8ab1743750abbe494061f5abaa7..366bffe3ad5cf2b233147f960c5b14b615490b16 100644
--- a/src/y-webrtc/index.js
+++ b/src/y-webrtc/index.js
@@ -41,7 +41,7 @@ function extend(Y) {
       webrtc.on("joinedRoom", () => {
         const id = webrtc.getMyId()
 
-        for (var f of self.userEventListeners) {
+        for (let f of self.userEventListeners) {
           f({ action: "userID", id: id })
         }