diff --git a/plone/app/discussion/catalog.py b/plone/app/discussion/catalog.py
index 12382df..5034928 100644
--- a/plone/app/discussion/catalog.py
+++ b/plone/app/discussion/catalog.py
@@ -33,7 +33,7 @@ def total_comments(object):
     if object.meta_type != 'Discussion Item':
         try:
             conversation = IConversation(object)
-            return conversation.total_comments
+            return conversation.total_comments()
         except TypeError:  # pragma: no cover
             # The item is contentish but nobody
             # implemented an adapter for it
diff --git a/plone/app/discussion/conversation.py b/plone/app/discussion/conversation.py
index e73546a..01d3182 100644
--- a/plone/app/discussion/conversation.py
+++ b/plone/app/discussion/conversation.py
@@ -77,7 +77,6 @@ class Conversation(Traversable, Persistent, Explicit):
         parent = aq_inner(self.__parent__)
         return parent.restrictedTraverse('@@conversation_view').enabled()
 
-    @property
     def total_comments(self):
         public_comments = [
             x for x in self.values()