diff --git a/lib/site_template/404.html b/lib/site_template/404.html
index c472b4ea..086a5c9e 100644
--- a/lib/site_template/404.html
+++ b/lib/site_template/404.html
@@ -1,4 +1,5 @@
 ---
+permalink: /404.html
 layout: default
 ---