diff --git a/app/helpers/wiki_helper.rb b/app/helpers/wiki_helper.rb
index 009d6f8cb..c25064616 100644
--- a/app/helpers/wiki_helper.rb
+++ b/app/helpers/wiki_helper.rb
@@ -49,7 +49,7 @@ module WikiHelper
           words_add += 1
         else
           del_at = pos unless del_at
-          deleted << ' ' + change[2]
+          deleted << ' ' + h(change[2])
           words_del	 += 1
         end
       end