diff --git a/rustplus.js b/rustplus.js
index 4497096..aa6e95b 100644
--- a/rustplus.js
+++ b/rustplus.js
@@ -125,7 +125,7 @@ class RustPlus extends EventEmitter {
      * @returns {boolean}
      */
     isConnected() {
-        return (this.websocket.readyState === WebSocket.OPEN);
+        return (this.websocket && this.websocket.readyState === WebSocket.OPEN);
     }
 
     /**