--- a/src/pyams_content/component/paragraph/zmi/keynumber.py	Thu Jun 14 10:39:28 2018 +0200
+++ b/src/pyams_content/component/paragraph/zmi/keynumber.py	Thu Jun 14 10:40:08 2018 +0200
@@ -82,6 +82,7 @@
                 permission=MANAGE_CONTENT_PERMISSION)
 @ajax_config(name='properties.json', context=IKeyNumberParagraph, layer=IPyAMSLayer,
              base=BaseParagraphAJAXEditForm)
+@implementer(IKeyNumbersParentForm)
 class KeyNumberParagraphPropertiesEditForm(BaseParagraphPropertiesEditForm):
     """Key number paragraph properties edit form"""