diff --git a/nginx/base.conf b/nginx/base.conf
index b3dfb7f..310f0b1 100644
--- a/nginx/base.conf
+++ b/nginx/base.conf
@@ -3,6 +3,12 @@ server_name metanohi.name www.metanohi.name;
 root /var/www/metanohi.name/web-serve;
 index index.html;
 
+error_page 404 /404.html
+
+location /404 {
+    internal;
+}
+
 location ~ \.html$ {
     internal;
 }
diff --git a/scripts/transform-file.py b/scripts/transform-file.py
index c1984c8..435567f 100755
--- a/scripts/transform-file.py
+++ b/scripts/transform-file.py
@@ -97,7 +97,7 @@ def markdown_to_html(input_file, output_dir):
                     pages.append((dir + '/' + uri,
                                   os.path.normpath(os.path.join(base_dir, path, name))))
 
-        builtins = ['/', '/about/', '/about/niels', '/misc/']
+        builtins = ['/', '/about/', '/about/niels', '/misc/', '/404']
         pages = filter(lambda t: t[0] not in builtins, pages)
         pages_new = []
         for page in pages:
diff --git a/site/404.md b/site/404.md
new file mode 100644
index 0000000..03c89cb
--- /dev/null
+++ b/site/404.md
@@ -0,0 +1,3 @@
+# 404
+
+Try the next exit.