diff --git a/app/controllers/moderations_controller.rb b/app/controllers/moderations_controller.rb
index 48158c31..724e436c 100644
--- a/app/controllers/moderations_controller.rb
+++ b/app/controllers/moderations_controller.rb
@@ -101,7 +101,7 @@ class ModerationsController < ApplicationController
       config.access_token        = ENV['TWITTER_ACCESS_TOKEN']
       config.access_token_secret = ENV['TWITTER_ACCESS_SECRET']
     end
-    client.update "#{@event} #{events_url @event}" if client.consumer_key
+    client.update "#{@event.to_tweet url}" if client.consumer_key
   end
 
   def send_destroy_mails
diff --git a/app/models/event.rb b/app/models/event.rb
index c5d6bcea..dabe220f 100644
--- a/app/models/event.rb
+++ b/app/models/event.rb
@@ -99,6 +99,14 @@ class Event < ActiveRecord::Base
     "#{start_time.to_date} #{city}: #{title} #{hashtags.join(' ')}"
   end
 
+  def to_tweet(url)
+    tweet = to_s
+    if (tweet.size + url.size >= 140)
+      tweet = tweet[0, tweet[0, 140 - url.size].rindex(/\s/)]
+    end
+    "#{tweet} #{url}"
+  end
+
   private
 
   def end_after_start
diff --git a/app/views/moderations/validate.html.haml b/app/views/moderations/validate.html.haml
index dc2d26ee..ca82c879 100644
--- a/app/views/moderations/validate.html.haml
+++ b/app/views/moderations/validate.html.haml
@@ -22,8 +22,7 @@
 
     %h3=t '.tweet_helper'
 
-    = @event
-    = events_url @event
+    = @event.to_tweet events_url @event
 
 %fieldset
   %legend