diff --git a/tabellio/webviews/deputy_listform.pt b/tabellio/webviews/deputy_listform.pt
index f45913d..7a35e16 100644
--- a/tabellio/webviews/deputy_listform.pt
+++ b/tabellio/webviews/deputy_listform.pt
@@ -74,7 +74,7 @@
         </thead>
         <tbody>
         <tr tal:repeat="entry view/sortedDeputies">
-         <td tal:attributes="class string:name sortabledata-${entry/sortname}"><a tal:attributes="href entry/id">
+         <td tal:attributes="class python: 'name sortabledata-%s' % entry.sortname().replace(' ', '-')"><a tal:attributes="href entry/id">
              <span class="lastname" tal:content="entry/lastname"/>
              <span class="firstname" tal:content="entry/firstname"/></a></td>
          <td tal:attributes="class string:polgroup sortabledata-${entry/polgroup/to_object/id}"