diff --git a/longs/templates/longs/mark_answer.html b/longs/templates/longs/mark_answer.html
index 81b346b5..f03ceebd 100644
--- a/longs/templates/longs/mark_answer.html
+++ b/longs/templates/longs/mark_answer.html
@@ -18,11 +18,11 @@
         overview</a>, <a href="{% url 'longs:mark_overview' pk=exam.pk %}">marking
         overview</a><br />
     {% if previous_cid %}
-    <a href="{% url 'longs:mark_answer' pk=exam.pk sk=question_details.current|add:'-1' cid=previous_cid %}">Previous
+    <a href="{% url 'longs:mark_answer' exam_id=exam.pk question_number=question_details.current|add:'-1' cid=previous_cid %}">Previous
         candidate</a>
     {% endif %}
     {% if next_cid %}
-    <a href="{% url 'longs:mark_answer' pk=exam.pk sk=question_details.current|add:'-1' cid=next_cid %}">Next
+    <a href="{% url 'longs:mark_answer' exam_id=exam.pk question_number=question_details.current|add:'-1' cid=next_cid %}">Next
         candidate</a>
     {% endif %}
 </div>
@@ -100,10 +100,10 @@
     </form>
 </div>
 {% if previous_cid %}
-<a href="{% url 'longs:mark_answer' pk=exam.pk sk=question_details.current|add:'-1' cid=previous_cid %}">Previous
+<a href="{% url 'longs:mark_answer' exam_id=exam.pk question_number=question_details.current|add:'-1' cid=previous_cid %}">Previous
     candidate</a>
 {% endif %}
 {% if next_cid %}
-<a href="{% url 'longs:mark_answer' pk=exam.pk sk=question_details.current|add:'-1' cid=next_cid %}">Next candidate</a>
+<a href="{% url 'longs:mark_answer' exam_id=exam.pk question_number=question_details.current|add:'-1' cid=next_cid %}">Next candidate</a>
 {% endif %}
 {% endblock %}
\ No newline at end of file