diff --git a/app/helpers/mailer_helper.rb b/app/helpers/mailer_helper.rb
index ad6f042af..e541eebb6 100644
--- a/app/helpers/mailer_helper.rb
+++ b/app/helpers/mailer_helper.rb
@@ -3,6 +3,7 @@ module MailerHelper
   def commentable_url(commentable)
     return debate_url(commentable) if commentable.is_a?(Debate)
     return proposal_url(commentable) if commentable.is_a?(Proposal)
+    return budget_investment_url(commentable.budget_id, commentable) if commentable.is_a?(Budget::Investment)
   end
 
 end
\ No newline at end of file