diff --git a/fhem/FHEM/98_RandomTimer.pm b/fhem/FHEM/98_RandomTimer.pm
index 44b4a09ad..5df275ff7 100644
--- a/fhem/FHEM/98_RandomTimer.pm
+++ b/fhem/FHEM/98_RandomTimer.pm
@@ -534,7 +534,7 @@ sub RandomTimer_GetHashIndirekt ($$) {
     <b>Define</b>
     <ul>
       <code>
-        define &lt;name&gt; RandomTimer  &lt;timespec_start&gt; &lt;device&gt; &lt;timespec_stop&gt; [&lt;timeToSwitch&gt;]
+        define &lt;name&gt; RandomTimer  &lt;timespec_start&gt; &lt;device&gt; &lt;timespec_stop&gt; &lt;timeToSwitch&gt;
       </code>
       <br>
       Defines a device, that imitates the random switch functionality of a timer clock, like a <b>FS20 ZSU</b>. The idea to create it, came from the problem, that is was always a little bit tricky to install a timer clock before holiday: finding the manual, testing it the days before and three different timer clocks with three different manuals - a horror.<br>