diff --git a/app/helpers/cms_helper.rb b/app/helpers/cms_helper.rb
index 22c62ee..8f46e24 100644
--- a/app/helpers/cms_helper.rb
+++ b/app/helpers/cms_helper.rb
@@ -30,7 +30,7 @@ module CmsHelper
   end
 
   def display_spread_button(article)
-    expirable_button article, :spread, _('Spread this'), {:action => 'publish', :id => article.id}, {:class => 'colorbox', :modal => true}
+    expirable_button article, :spread, _('Spread this'), {:action => 'publish', :id => article.id}, {:modal => true}
   end
 
   def display_delete_button(article)
diff --git a/app/views/content_viewer/_article_toolbar.html.erb b/app/views/content_viewer/_article_toolbar.html.erb
index 4669b5f..9e4583e 100644
--- a/app/views/content_viewer/_article_toolbar.html.erb
+++ b/app/views/content_viewer/_article_toolbar.html.erb
@@ -18,7 +18,7 @@
 
     <% if @page.allow_spread?(user) && !remove_content_button(:spread, @page) %>
       <% url = profile.admin_url.merge({ :controller => 'cms', :action => 'publish', :id => @page.id }) %>
-      <%= expirable_button @page, :spread, content_tag( 'span', _('Spread this') ), url, {:class => 'colorbox', :modal => true} if url %>
+      <%= expirable_button @page, :spread, content_tag( 'span', _('Spread this') ), url, {:modal => true} if url %>
     <% end %>
 
     <% if !@page.gallery? && (@page.allow_create?(user) || (@page.parent && @page.parent.allow_create?(user))) %>
diff --git a/test/unit/cms_helper_test.rb b/test/unit/cms_helper_test.rb
index b9b4ab1..bb7ba9f 100644
--- a/test/unit/cms_helper_test.rb
+++ b/test/unit/cms_helper_test.rb
@@ -52,7 +52,7 @@ class CmsHelperTest < ActionView::TestCase
     plugins.stubs(:dispatch).returns([])
     profile = fast_create(Person)
     article = fast_create(TinyMceArticle, :name => 'My article', :profile_id => profile.id)
-    expects(:link_to).with('Spread this', {:action => 'publish', :id => article.id}, :class => 'button with-text icon-spread colorbox', :title => nil)
+    expects(:link_to).with('Spread this', {:action => 'publish', :id => article.id}, :class => 'modal-toggle button with-text icon-spread', :title => nil)
 
     result = display_spread_button(article)
   end
--
libgit2 0.21.2