diff --git a/fhem/FHEM/01_FHEMWEB.pm b/fhem/FHEM/01_FHEMWEB.pm
index 858cbb00a..661569b6a 100644
--- a/fhem/FHEM/01_FHEMWEB.pm
+++ b/fhem/FHEM/01_FHEMWEB.pm
@@ -1154,7 +1154,7 @@ FW_dataAttr()
     my ($p, $default) = @_;
     my $val = AttrVal($FW_wname,$p, $default);
     $val =~ s/&/&/g;
-    $val =~ s/'/"/g;
+    $val =~ s/'/'/g;
     return "data-$p='$val' ";
   }