diff --git a/biscuit/apps/chronos/templates/timetable/substitution.html b/biscuit/apps/chronos/templates/timetable/substitution.html
index c2b34b9540b785c34f6a7930bb9d99f8b3d83f30..bfa5e075eb468fdac7d9dc7cff0d3b286aa1fd55 100755
--- a/biscuit/apps/chronos/templates/timetable/substitution.html
+++ b/biscuit/apps/chronos/templates/timetable/substitution.html
@@ -15,7 +15,7 @@
         <div class="col l4 xl6">
         </div>
         <div class="col s12 m6 l4 xl3 right align-right">
-            <a class="waves-effect waves-teal btn-flat btn-flat-medium right" href="{% url "timetable_substitutions_pdf %}">
+            <a class="waves-effect waves-teal btn-flat btn-flat-medium right" href="{% url "timetable_substitutions_pdf" %}">
                 <i class="material-icons center">print</i>
             </a>
         </div>