diff --git a/src/y-webrtc/index.js b/src/y-webrtc/index.js
index 1a001b40a89319b65a22ea41089ac41aa63ce2bb..2324e71cfb00b54c5b42c9bc83b7b04679eddca2 100644
--- a/src/y-webrtc/index.js
+++ b/src/y-webrtc/index.js
@@ -161,7 +161,7 @@ function extend(Y) {
     }
 
     raiseUserEvent(action, user_id) {
-      for (let f of this.userEventListeners) {
+      for (const f of this.userEventListeners) {
         f({ action: action, user: user_id })
       }
     }