diff --git a/plone/app/discussion/browser/moderation.py b/plone/app/discussion/browser/moderation.py
index 4209f11..78b3b99 100644
--- a/plone/app/discussion/browser/moderation.py
+++ b/plone/app/discussion/browser/moderation.py
@@ -39,12 +39,14 @@ class View(BrowserView):
         """
         context = aq_inner(self.context)
         workflowTool = getToolByName(context, 'portal_workflow')
-        comment_workflow = workflowTool.getChainForPortalType('Discussion Item')[0]
-        comment_workflow = workflowTool[comment_workflow]
-        if 'pending' in comment_workflow.states:
-            return True
-        else:
-            return False
+        comment_workflow = workflowTool.getChainForPortalType('Discussion Item')
+        if comment_workflow:
+            comment_workflow = comment_workflow[0]
+            comment_workflow = workflowTool[comment_workflow]
+            if 'pending' in comment_workflow.states:
+                return True
+            else:
+                return
 
 
 class ModerateCommentsEnabled(BrowserView):
@@ -56,12 +58,14 @@ class ModerateCommentsEnabled(BrowserView):
         """
         context = aq_inner(self.context)
         workflowTool = getToolByName(context, 'portal_workflow', None)
-        comment_workflow = workflowTool.getChainForPortalType('Discussion Item')[0]
-        comment_workflow = workflowTool[comment_workflow]
-        if 'pending' in comment_workflow.states:
-            return True
-        else:
-            return
+        comment_workflow = workflowTool.getChainForPortalType('Discussion Item')
+        if comment_workflow:
+            comment_workflow = comment_workflow[0]
+            comment_workflow = workflowTool[comment_workflow]
+            if 'pending' in comment_workflow.states:
+                return True
+            else:
+                return
 
 
 class DeleteComment(BrowserView):
diff --git a/plone/app/discussion/tests/test_moderation_view.py b/plone/app/discussion/tests/test_moderation_view.py
index 3382dd1..d5ecda5 100644
--- a/plone/app/discussion/tests/test_moderation_view.py
+++ b/plone/app/discussion/tests/test_moderation_view.py
@@ -47,6 +47,9 @@ class ModerationViewTest(unittest.TestCase):
         """Make sure that moderation_enabled returns true if the comment
            workflow implements a 'pending' state.
         """
+        # If workflow is not set, enabled must return False
+        self.wf_tool.setChainForPortalTypes(('Discussion Item',),())
+        self.assertEqual(self.view.moderation_enabled(), False)
         # The one_state_workflow does not have a 'pending' state
         self.wf_tool.setChainForPortalTypes(('Discussion Item',),
                                             ('one_state_workflow,'))
@@ -77,7 +80,6 @@ class ModerationViewTest(unittest.TestCase):
         self.assertTrue('No comments to moderate' in view)
         self.assertEqual(len(self.view.comments), 0)
 
-
 class ModerationBulkActionsViewTest(unittest.TestCase):
 
     layer = PLONE_APP_DISCUSSION_INTEGRATION_TESTING