diff --git a/app/views/mailer/wiki_content_updated.text.html.rhtml b/app/views/mailer/wiki_content_updated.text.html.rhtml
index f84e92326..a5ca0a08e 100644
--- a/app/views/mailer/wiki_content_updated.text.html.rhtml
+++ b/app/views/mailer/wiki_content_updated.text.html.rhtml
@@ -3,4 +3,4 @@
 <em><%=h @wiki_content.comments %></em></p>
 
 <p><%= l(:label_view_diff) %>:<br />
-<%= link_to @wiki_diff_url, @wiki_diff_url %></p>
+<%= link_to h(@wiki_diff_url), @wiki_diff_url %></p>