diff --git a/lib/controller.js b/lib/controller.js
index 8ece19ff..5226a660 100644
--- a/lib/controller.js
+++ b/lib/controller.js
@@ -348,7 +348,7 @@ class Controller {
                 logger.transports.console.level = level;
                 logger.transports.file.level = level;
             } else {
-                logger.error(`Could not set log level to '${level}'`);
+                logger.error(`Could not set log level to '${level}'. Allowed level: '${allowedLogLevels.join(',')}'`);
             }
         } else if (option === 'devices') {
             const devices = this.zigbee.getAllClients().map((device) => {