diff --git a/fhem/FHEM/00_FHZ.pm b/fhem/FHEM/00_FHZ.pm
index c19e0e3d2..2a1a31893 100755
--- a/fhem/FHEM/00_FHZ.pm
+++ b/fhem/FHEM/00_FHZ.pm
@@ -439,7 +439,7 @@ FHZ_ReadAnswer($$$)
 {
   my ($hash,$arg, $to) = @_;
 
-  return undef if(!$hash || ($^O!~/Win/ && !defined($hash->{FD}));
+  return undef if(!$hash || ($^O!~/Win/ && !defined($hash->{FD})));
 
   my ($mfhzdata, $rin) = ("", '');
   my $nfound;