diff --git a/app/controllers/cache_sweeping_helper.rb b/app/controllers/cache_sweeping_helper.rb
index fe4098ff..2bf3e9f8 100644
--- a/app/controllers/cache_sweeping_helper.rb
+++ b/app/controllers/cache_sweeping_helper.rb
@@ -3,6 +3,8 @@ module CacheSweepingHelper
   def expire_cached_page(web, page_name)
     expire_action :controller => 'wiki', :web => web.address,
         :action => %w(show published), :id => page_name
+    expire_action :controller => 'wiki', :web => web.address,
+        :action => %w(show published), :id => page_name, :mode => 'diff'
   end
 
   def expire_cached_summary_pages(web)