diff --git a/static/cosmopolite.js b/static/cosmopolite.js
index 04e0c2c..457bf4d 100644
--- a/static/cosmopolite.js
+++ b/static/cosmopolite.js
@@ -1161,7 +1161,6 @@ Cosmopolite.prototype.onMessage_ = function(e) {
     return message['id'] == e.id;
   });
   if (duplicate) {
-    console.log(this.loggingPrefix_(), 'duplicate message:', e);
     return;
   }
   e['message'] = JSON.parse(e['message']);