diff --git a/source/404.md b/source/404.md
index 37fc0df1..ddea14fa 100644
--- a/source/404.md
+++ b/source/404.md
@@ -1,5 +1,6 @@
 ---
 layout: default
 title: Page Not Found
+permalink: /404.html
 ---
 # Page Not Found
\ No newline at end of file