diff --git a/fhem/www/pgm2/ios7style.css b/fhem/www/pgm2/ios7style.css
index d646b0954..884b1471b 100644
--- a/fhem/www/pgm2/ios7style.css
+++ b/fhem/www/pgm2/ios7style.css
@@ -60,6 +60,11 @@ table.block tr.odd { background: #fff; }
 table.block tr.sel { background: #d9d9d9; }
 table.block td { padding:3px; }
 
+/* Bugfix fuer readingsGroup */
+table.block table.block {
+width: 100%;
+}
+
 table.assoc a { color: #147bff; }
 
 table.fileList { width:790px; }