diff --git a/seminar/templates/seminar/archiv/cislo.html b/seminar/templates/seminar/archiv/cislo.html
index 2e912dde..e0af0813 100644
--- a/seminar/templates/seminar/archiv/cislo.html
+++ b/seminar/templates/seminar/archiv/cislo.html
@@ -74,7 +74,7 @@
         <th class='border-r'>#
         <th class='border-r'>Jméno
         {% for p in problemy %}
-        <th class='border-r' id="problem{{ p.kod_v_rocniku }}"><a href="{{ p.verejne_url }}">{{ p.kod_v_rocniku }}</a>
+        <th class='border-r' id="problem{{ forloop.counter }}"><a href="{{ p.verejne_url }}">{{ p.kod_v_rocniku }}</a>
 
             {# TODELETE #}
                 {% for podproblemy in podproblemy_iter.next %}