diff --git a/aleksis/apps/alsijil/templates/alsijil/partials/register_coursebook.html b/aleksis/apps/alsijil/templates/alsijil/partials/register_coursebook.html
index ec54164d637bf7c7f7e56f3dcb98ecf4b0504b33..f6d7e4310781bfc6e445cf2a22d982675c9acb2b 100644
--- a/aleksis/apps/alsijil/templates/alsijil/partials/register_coursebook.html
+++ b/aleksis/apps/alsijil/templates/alsijil/partials/register_coursebook.html
@@ -36,7 +36,7 @@
           {% endif %}
           <td class="lesson-pe">
             {% if doc.amends %}
-              {% if doc.amends.slot_number_start == doc.amends.slot_number_ends %}
+              {% if doc.amends.slot_number_start == doc.amends.slot_number_end %}
                 {{ doc.amends.slot_number_start }}.
               {% else %}
                 {{ doc.amends.slot_number_start }}.–{{ doc.amends.slot_number_end }}.