diff --git a/fhem/docs/commandref.html b/fhem/docs/commandref.html
index 09e414fad..f0d46b058 100644
--- a/fhem/docs/commandref.html
+++ b/fhem/docs/commandref.html
@@ -4279,7 +4279,7 @@ A line ending with \ will be concatenated with the next one, so long lines
     <br><br>
     Example:
     <ul>
-      <code>define KM271 KM271 /dev/ttyS0</code><br>
+      <code>define KM271 KM271 /dev/ttyS0@2400</code><br>
     </ul>
   </ul>
   <br>