diff --git a/fhem/fhem.pl b/fhem/fhem.pl
index 81781a781..1af4c47dc 100755
--- a/fhem/fhem.pl
+++ b/fhem/fhem.pl
@@ -959,6 +959,7 @@ CommandRereadCfg($$)
   }
 
   my $cfgfile = $attr{global}{configfile};
+  %comments = ();
   %defs = ();
   %attr = ();
   %selectlist = ();