diff --git a/plone/app/discussion/comment.py b/plone/app/discussion/comment.py
index bd7d08b..a573ed2 100644
--- a/plone/app/discussion/comment.py
+++ b/plone/app/discussion/comment.py
@@ -11,7 +11,9 @@ from AccessControl.Owned import Owned
 
 from plone.app.discussion.interfaces import IComment
 
-class Comment(Explicit, Traversable, RoleManager, Owned):
+from Products.CMFCore.DynamicType import DynamicType
+
+class Comment(DynamicType, Traversable, RoleManager, Owned, Explicit):
     """A comment.
     
     This object attempts to be as lightweight as possible. We implement a
@@ -71,5 +73,16 @@ class Comment(Explicit, Traversable, RoleManager, Owned):
         """The name of the person who wrote the comment
         """
         return self.creator
+    
+    # CMF's event handlers assume any IDynamicType has these :(
+    
+    def opaqueItems(self):
+        return []
+    
+    def opaqueIds(self):
+        return []
+    
+    def opaqueValues(self):
+        return []
 
 CommentFactory = Factory(Comment)
\ No newline at end of file
diff --git a/plone/app/discussion/profiles/default/types.xml b/plone/app/discussion/profiles/default/types.xml
new file mode 100644
index 0000000..4ecc628
--- /dev/null
+++ b/plone/app/discussion/profiles/default/types.xml
@@ -0,0 +1,4 @@
+<?xml version="1.0"?>
+<object name="portal_types" meta_type="CMF Types Tool">
+ <object name="Discussion Item" meta_type="Factory-based Type Information"/>
+</object>
diff --git a/plone/app/discussion/profiles/default/types/Discussion_Item.xml b/plone/app/discussion/profiles/default/types/Discussion_Item.xml
new file mode 100644
index 0000000..ac15877
--- /dev/null
+++ b/plone/app/discussion/profiles/default/types/Discussion_Item.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0"?>
+<object name="Discussion Item" meta_type="Factory-based Type Information"
+   i18n:domain="plone.app.discussion" xmlns:i18n="http://xml.zope.org/namespaces/i18n">
+ <property name="title" i18n:translate="">Comment</property>
+ <property name="description" i18n:translate="">Comments added to a content item.</property>
+ <property name="content_icon">discussionitem_icon.gif</property>
+ <property name="content_meta_type">Discussion Item</property>
+ <property name="product"></property>
+ <property name="factory">plone.Comment</property>
+ <property name="immediate_view"></property>
+ <property name="global_allow">False</property>
+ <property name="filter_content_types">True</property>
+ <property name="allowed_content_types"/>
+ <property name="allow_discussion">True</property>
+ <alias from="(Default)" to="@@view"/>
+ <alias from="view" to="@@view"/>
+ <action title="View" action_id="view" category="object" condition_expr=""
+    url_expr="string:${object_url}/@@view" visible="True">
+  <permission value="View"/>
+ </action>
+</object>
diff --git a/plone/app/discussion/tests/test_comment.py b/plone/app/discussion/tests/test_comment.py
index 2374c93..254ab11 100644
--- a/plone/app/discussion/tests/test_comment.py
+++ b/plone/app/discussion/tests/test_comment.py
@@ -63,7 +63,13 @@ class CommentTest(PloneTestCase):
     
     def test_fti(self):
         # test that we can look up an FTI for Discussion Item
-        pass
+        
+        self.assert_("Discussion Item" in self.portal.portal_types.objectIds())
+        
+        comment1 = createObject('plone.Comment')
+        
+        fti = self.portal.portal_types.getTypeInfo(comment1)
+        self.assertEquals('Discussion Item', fti.getTypeInfo(comment1).getId())
 
 class RepliesTest(PloneTestCase):