diff --git a/plone/app/discussion/conversation.py b/plone/app/discussion/conversation.py
index 2f824d6..b28054f 100644
--- a/plone/app/discussion/conversation.py
+++ b/plone/app/discussion/conversation.py
@@ -167,8 +167,7 @@ class Conversation(Traversable, Persistent, Explicit):
 
     @property
     def commentators(self):
-        if len(self._commentators.keys()) != 0:
-            return self._commentators.keys()
+        return self._commentators.keys()
 
     def objectIds(self):
         return self._comments.keys()