diff --git a/lib/alexa-remote-ext.js b/lib/alexa-remote-ext.js
index ea31c42..8c20652 100644
--- a/lib/alexa-remote-ext.js
+++ b/lib/alexa-remote-ext.js
@@ -512,7 +512,7 @@ class AlexaRemoteExt extends AlexaRemote {
 	}
 	async initDevicesExt() {
 		return this.getDevicesPromise().then(response => {
-			this.deviceByIdExt = new Map(response.devices.map(o => [o.serialNumber, o]));
+			this.deviceByIdExt = new Map(response.devices?.map(o => [o.serialNumber, o]));
 			this._deviceChange();
 		});
 	}
@@ -1162,4 +1162,4 @@ class AlexaRemoteExt extends AlexaRemote {
 	}
 }
 
-module.exports = AlexaRemoteExt;
\ No newline at end of file
+module.exports = AlexaRemoteExt;