diff --git a/README.md b/README.md
index 08c223e..3268954 100644
--- a/README.md
+++ b/README.md
@@ -57,7 +57,7 @@ Now configure the FRITZ!Box router to push IP changes towards this service. Log
 | Password   | Enter '_' if `DYNDNS_SERVER_PASSWORD` env is unset                                    |
 
 If you specified credentials you need to append them as additional GET parameters into the Update-URL
-like `&username=<user>&password=<pass>`.
+like `&username=<username>&password=<pass>`.
 
 ### FRITZ!Box polling