diff --git a/public/missing.md b/public/missing.md
index 0b6be3a..dbcf3d7 100644
--- a/public/missing.md
+++ b/public/missing.md
@@ -1,5 +1,5 @@
 ---
-Hide extension: no
+Show extension: yes
 ---
 
 <p align="center">four oh four</p>
diff --git a/samhuri.net/Sources/samhuri.net/Site/MarkdownRenderer.swift b/samhuri.net/Sources/samhuri.net/Site/MarkdownRenderer.swift
index 658a5a4..9912b66 100644
--- a/samhuri.net/Sources/samhuri.net/Site/MarkdownRenderer.swift
+++ b/samhuri.net/Sources/samhuri.net/Site/MarkdownRenderer.swift
@@ -30,8 +30,9 @@ final class MarkdownRenderer: Renderer {
         let pageHTML = try pageRenderer.renderPage(site: site, bodyHTML: bodyHTML, metadata: metadata)
 
         let mdFilename = fileURL.lastPathComponent
+        let showExtension = mdFilename == "index.md" || metadata["Show extension"]?.lowercased() == "yes"
         let htmlPath: String
-        if metadata["Hide extension"]?.lowercased() == "no" || mdFilename == "index.md" {
+        if showExtension {
             htmlPath = mdFilename.replacingOccurrences(of: ".md", with: ".html")
         }
         else {