diff --git a/src/pfwbged/policy/browser/multi_attribute_task.py b/src/pfwbged/policy/browser/multi_attribute_task.py
index 957df36..9515679 100644
--- a/src/pfwbged/policy/browser/multi_attribute_task.py
+++ b/src/pfwbged/policy/browser/multi_attribute_task.py
@@ -34,16 +34,17 @@ class AttributeTasks(DefaultAddForm):
     def updateWidgets(self):
         """Update widgets then add workflow_action value to workflow_action field"""
         super(AttributeTasks, self).updateWidgets()
-        for obj_id in self.request.documents.split(','):
-            base_obj = api.content.get(str(obj_id))
-            if ITask.providedBy(base_obj):
-                self.widgets['title'].value = base_obj.title
-                break
-            else:
-                tasks = base_obj.listFolderContents({"portal_type": "task"})
-                if tasks:
-                    self.widgets['title'].value = tasks[0].title
+        if hasattr(self.request, 'documents'):
+            for obj_id in self.request.documents.split(','):
+                base_obj = api.content.get(str(obj_id))
+                if ITask.providedBy(base_obj):
+                    self.widgets['title'].value = base_obj.title
                     break
+                else:
+                    tasks = base_obj.listFolderContents({"portal_type": "task"})
+                    if tasks:
+                        self.widgets['title'].value = tasks[0].title
+                        break
 
     @button.buttonAndHandler(_('Add'), name='add')
     def handleAdd(self, action):