diff --git a/templates/includes/macros.html.tera b/templates/includes/macros.html.tera
index 7566399..7a88a1a 100644
--- a/templates/includes/macros.html.tera
+++ b/templates/includes/macros.html.tera
@@ -57,7 +57,7 @@
 {% endmacro alert %}
 
 {% macro box(participants, empty_seats='', header='Freie Plätze:', text='Keine Ruderer angemeldet', bg='primary-600', color='white') %}
-<div class="text-{{ color }} bg-{{ bg }} text-center p-1 mt-1 rounded-t-md">{{ header }} {{ empty_seats }}</div>
+<div class="text-{{ color }} bg-{{ bg }} text-center p-1 mt-1 rounded-t-md">{{ header }} {% if empty_seats >= 0 %} {{ empty_seats }} {% else %} 0 {% endif %}</div>
 <div class="p-2 border border-t-0 border-{{ bg }} mb-4 rounded-b-md">
   {% if participants | length > 0 %}
     {% for rower in participants %}