diff --git a/boards/models/post.py b/boards/models/post.py
--- a/boards/models/post.py
+++ b/boards/models/post.py
@@ -291,7 +291,7 @@ class Post(models.Model):
         thread.last_edit_time = edit_time
         thread.save()
 
-    def get_url(self, opening_id=None):
+    def get_url(self):
         """
         Get full url to this post
         """
@@ -300,9 +300,7 @@ class Post(models.Model):
         link = cache.get(cache_key)
 
         if not link:
-            if not opening_id:
-                opening_post = self.get_thread().get_opening_post()
-                opening_id = opening_post.id
+            opening_id = self.get_thread().get_opening_post_id()
 
             if self.id != opening_id:
                 link = reverse('thread', kwargs={
diff --git a/boards/templates/boards/post.html b/boards/templates/boards/post.html
--- a/boards/templates/boards/post.html
+++ b/boards/templates/boards/post.html
@@ -31,7 +31,7 @@
         <div class="message">
             <div class="post-info">
                 <span class="title">{{ post.title }}</span>
-                <a class="post_id" href="{% post_object_url post opening_post_id %}">
+                <a class="post_id" href="{% post_object_url post %}">
                     ({{ post.id }}) </a>
                 [<span class="pub_time">{{ post.pub_time }}</span>]
                 {% if thread.archived %}
@@ -73,7 +73,7 @@
                     <div class="refmap">
                         {% trans "Replies" %}:
                         {% for ref_post in refposts %}
-                            <a href="{% post_object_url ref_post opening_post_id %}">&gt;&gt;{{ ref_post.id }}</a
+                            <a href="{% post_object_url ref_post %}">&gt;&gt;{{ ref_post.id }}</a
                                     >{% if not forloop.last %},{% endif %}
                         {% endfor %}
                     </div>
diff --git a/boards/templatetags/board.py b/boards/templatetags/board.py
--- a/boards/templatetags/board.py
+++ b/boards/templatetags/board.py
@@ -20,25 +20,17 @@ actions = [
 @register.simple_tag(name='post_url')
 def post_url(*args, **kwargs):
     post_id = args[0]
-    if len(args) > 1:
-        opening_post_id = args[1]
-    else:
-        opening_post_id = None
 
     post = get_object_or_404(Post, id=post_id)
 
-    return post.get_url(opening_post_id)
+    return post.get_url()
 
 
 @register.simple_tag(name='post_object_url')
 def post_object_url(*args, **kwargs):
     post = args[0]
-    if len(args) > 1:
-        opening_post_id = args[1]
-    else:
-        opening_post_id = None
 
-    return post.get_url(opening_post_id)
+    return post.get_url()
 
 
 @register.simple_tag(name='image_actions')
@@ -78,10 +70,7 @@ def post_view(post, moderator=False, nee
     else:
         can_bump = thread.can_bump()
 
-    if 'opening_post_id' in kwargs:
-        opening_post_id = kwargs['opening_post_id']
-    else:
-        opening_post_id = thread.get_opening_post().id
+    opening_post_id = thread.get_opening_post_id()
 
     return {
         'post': post,