diff --git a/lib/controller.js b/lib/controller.js
index 76160ee7..ba5eceeb 100644
--- a/lib/controller.js
+++ b/lib/controller.js
@@ -131,8 +131,8 @@ class Controller {
         // Log
         logger.debug(
             `Received zigbee message of type '${message.type}' with data '${JSON.stringify(message.data)}'` +
-            (device ? ` of device '${device.modelId}' (${device.ieeeAddr})` : '' +
-            (message.groupid ? ` with groupID ${message.groupID}` : ''))
+            (device ? ` of device '${device.modelId}' (${device.ieeeAddr})` : '') +
+            (message.groupid ? ` with groupID ${message.groupID}` : '')
         );
 
         // Call extensions.