--- a/src/pyams_content/component/paragraph/zmi/milestone.py	Mon Jun 11 14:42:25 2018 +0200
+++ b/src/pyams_content/component/paragraph/zmi/milestone.py	Mon Jun 11 14:42:50 2018 +0200
@@ -304,7 +304,7 @@
 
 @pagelet_config(name='add-milestone.html', context=IMilestoneContainerTarget, layer=IPyAMSLayer,
                 permission=MANAGE_CONTENT_PERMISSION)
-@ajax_config(name='add-milestone.json', context=IParagraphContainerTarget, layer=IPyAMSLayer,
+@ajax_config(name='add-milestone.json', context=IMilestoneContainerTarget, layer=IPyAMSLayer,
              base=AJAXAddForm)
 class MilestoneAddForm(AdminDialogAddForm):
     """Milestone add form"""