diff --git a/externs/cosmopolite.js b/externs/cosmopolite.js
index b6bddcd..60cbfed 100644
--- a/externs/cosmopolite.js
+++ b/externs/cosmopolite.js
@@ -76,6 +76,14 @@ function Cosmopolite(
 Cosmopolite.prototype.shutdown = function() {};
 
 
+/**
+ * @see https://www.cosmopolite.org/reference#connected
+ * @return {boolean}
+ * @nosideeffects
+ */
+Cosmopolite.prototype.connected = function() {};
+
+
 /**
  * @see https://www.cosmopolite.org/reference#getProfile
  * @return {Promise}