diff --git a/biscuit/apps/chronos/templates/chronos/lessons_list.html b/biscuit/apps/chronos/templates/chronos/lessons_list.html
index dd06df9e558b14935661b84babe6a55d64c344f5..b51a9c51874b84c8d9c4f9a93bbb7791f57a4bd8 100644
--- a/biscuit/apps/chronos/templates/chronos/lessons_list.html
+++ b/biscuit/apps/chronos/templates/chronos/lessons_list.html
@@ -22,7 +22,7 @@
    <thead>
     <tr>
      <th>{% blocktrans %}Period{% endblocktrans %}</th>
-     <th>{% blocktrans %}Groups{% endblocktrans %}</th>
+     <th>{% blocktrans %}Groups{% endblocktans %}</th>
      <th>{% blocktrans %}Subject{% endblocktrans %}</th>
      <th>{% blocktrans %}Teachers{% endblocktrans %}</th>
     </tr>