diff --git a/app/models/page_part.rb b/app/models/page_part.rb
index efb41af9..64347fab 100644
--- a/app/models/page_part.rb
+++ b/app/models/page_part.rb
@@ -59,7 +59,7 @@ class PagePart
     when 'public_r_tag'
       self.public_r_tag.humanize
     when 'module_widget'
-      self.module_app.title
+      self.module_app.title rescue I18n.t(:undefined)
     else
       I18n.t(:undefined)
     end