diff --git a/proposals/models.py b/proposals/models.py
index abe0ca8..a21a6d4 100644
--- a/proposals/models.py
+++ b/proposals/models.py
@@ -1,4 +1,5 @@
 from enum import IntEnum
+from datetime import timedelta
 
 from django.contrib.auth.models import User
 from django.contrib.sites.models import Site
@@ -162,6 +163,11 @@ class Talk(PonyConfModel):
         else:
             return 0
 
+
+    @property
+    def end_date(self):
+        return self.start_date + timedelta(minutes=self.duration)
+
     class Meta:
         ordering = ('event__id',)
 
diff --git a/proposals/templates/proposals/talk_detail.html b/proposals/templates/proposals/talk_detail.html
index 6167041..efefe7c 100644
--- a/proposals/templates/proposals/talk_detail.html
+++ b/proposals/templates/proposals/talk_detail.html
@@ -19,7 +19,7 @@
 <dl class="dl-horizontal">
     <dt>{% trans "Format" %}</dt>
       <dd><a href="{{ talk.event.get_absolute_url }}">{{ talk.event }}</a></dd>
-    <dt>{% trans "Topics:" %}</dt>
+    <dt>{% trans "Topics" %}</dt>
       <dd>{% for topic in talk.topics.all %}
       <a href="{{ topic.get_absolute_url }}">{{ topic }}</a>{% if not forloop.last %}, {% endif %}
       {% empty %}
@@ -37,7 +37,7 @@
       <dd>{% if talk.start_date %}
           <span class="date">{{ talk.start_date|date:"l d b" }}</span>,
           <span class="time">{{ talk.start_date|date:"H:i" }} &ndash;
-            {{ talk.slot.end|date:"H:i" }}</span>
+            {{ talk.end_date|date:"H:i" }}</span>
           {% else %}<em>{% trans "not defined" %}</em>
           {% endif %}
       </dd>