diff --git a/aleksis/apps/alsijil/templates/alsijil/partials/person_overview.html b/aleksis/apps/alsijil/templates/alsijil/partials/person_overview.html
index 0f412d031bc30ff4b380655bae3e732057df8b46..1e80047b6da02ee0aada1a3324dd2e584411137f 100644
--- a/aleksis/apps/alsijil/templates/alsijil/partials/person_overview.html
+++ b/aleksis/apps/alsijil/templates/alsijil/partials/person_overview.html
@@ -61,7 +61,7 @@
       {% endfor %}
       <tr>
         <th colspan="3">{% trans 'Tardiness' %}</th>
-        <td>{{ person.tardiness_sum }}'/{{ person.tardiness_count }}&times;</td>
+        <td>{{ person.tardiness_sum|default_if_none:0 }}'/{{ person.tardiness_count }}&times;</td>
       </tr>
     </table>
   </div>
diff --git a/aleksis/apps/alsijil/templates/alsijil/partials/register_members_table.html b/aleksis/apps/alsijil/templates/alsijil/partials/register_members_table.html
index b306ff74361446e8285ce90741adc271fbc09fa6..cb5c2ec4c7c0a4a0f9d2c0d084ad90da9d08ad95 100644
--- a/aleksis/apps/alsijil/templates/alsijil/partials/register_members_table.html
+++ b/aleksis/apps/alsijil/templates/alsijil/partials/register_members_table.html
@@ -43,7 +43,7 @@
       {% for absence_reason in absence_reasons_not_counted %}
         <td>{{ person|get_dict:absence_reason.count_label }}</td>
       {% endfor %}
-      <td>{{ person.tardiness_sum }}'/{{ person.tardiness_count }}&times;</td>
+      <td>{{ person.tardiness_sum|default_if_none:0 }}'/{{ person.tardiness_count }}&times;</td>
       {% for extra_mark in extra_marks %}
         <td>{{ person|get_dict:extra_mark.count_label }}</td>
       {% endfor %}