diff --git a/fhem/FHEM/98_cmdalias.pm b/fhem/FHEM/98_cmdalias.pm
index d5ac5b198..2710da77a 100644
--- a/fhem/FHEM/98_cmdalias.pm
+++ b/fhem/FHEM/98_cmdalias.pm
@@ -87,6 +87,7 @@ CommandCmdAlias($$$)
       return $r;
     }
   }
+  return undef if(!$a->{OrigFn});
   no strict "refs";
   return &{$a->{OrigFn} }($cl, $param, $alias);
   use strict "refs";