diff --git a/crates/core/src/writing/mod.rs b/crates/core/src/writing/mod.rs
index 4dd31d2a9..5b50c38ac 100644
--- a/crates/core/src/writing/mod.rs
+++ b/crates/core/src/writing/mod.rs
@@ -43,6 +43,22 @@ where
     }
 }
 
+#[async_trait]
+impl<P> Writer for Option<P>
+where
+    P: Piece + Sized + Send,
+{
+    #[inline]
+    async fn write(mut self, _req: &mut Request, _depot: &mut Depot, res: &mut Response) {
+        match self {
+            Some(v) => v.render(res),
+            None => {
+                res.status_code(StatusCode::NOT_FOUND);
+            }
+        }
+    }
+}
+
 #[async_trait]
 impl<T, E> Writer for Result<T, E>
 where
diff --git a/crates/serve-static/src/embed.rs b/crates/serve-static/src/embed.rs
index 021898a74..c754c6233 100644
--- a/crates/serve-static/src/embed.rs
+++ b/crates/serve-static/src/embed.rs
@@ -56,6 +56,9 @@ fn render_embedded_data(
     res: &mut Response,
     mime: Option<Mime>,
 ) {
+    let mime = mime.unwrap_or_else(|| mime_guess::from_path(req.uri().path()).first_or_octet_stream());
+    res.headers_mut().insert(CONTENT_TYPE, mime.as_ref().parse().unwrap());
+
     let hash = hex::encode(metadata.sha256_hash());
     // if etag is matched, return 304
     if req
@@ -71,8 +74,6 @@ fn render_embedded_data(
     // otherwise, return 200 with etag hash
     res.headers_mut().insert(ETAG, hash.parse().unwrap());
 
-    let mime = mime.unwrap_or_else(|| mime_guess::from_path(req.uri().path()).first_or_octet_stream());
-    res.headers_mut().insert(CONTENT_TYPE, mime.as_ref().parse().unwrap());
     match data {
         Cow::Borrowed(data) => {
             res.write_body(data).ok();
diff --git a/examples/static-embed-file/src/main.rs b/examples/static-embed-file/src/main.rs
index 57a3dba06..76ddfc87a 100644
--- a/examples/static-embed-file/src/main.rs
+++ b/examples/static-embed-file/src/main.rs
@@ -21,5 +21,7 @@ async fn serve_file(req: &mut Request, res: &mut Response) {
     let path = req.param::<String>("**path").unwrap();
     if let Some(file) = Assets::get(&path) {
         file.render(req, res);
+    } else {
+        res.status_code(StatusCode::NOT_FOUND);
     }
 }