diff --git a/viz/src/responder.rs b/viz/src/responder.rs
index 9f062c56..415c9bae 100644
--- a/viz/src/responder.rs
+++ b/viz/src/responder.rs
@@ -55,7 +55,7 @@ where
                     .map(Result::Ok),
             )
         } else {
-            Box::pin(async { Ok(StatusCode::NOT_FOUND.into_response()) })
+            Box::pin(not_found())
         }
     }
 }
@@ -72,3 +72,8 @@ where
         Handler::call(self, req)
     }
 }
+
+#[inline(always)]
+async fn not_found() -> Result<Response, Infallible> {
+    Ok(StatusCode::NOT_FOUND.into_response())
+}
diff --git a/viz/src/server.rs b/viz/src/server.rs
index c93da72c..73ca7b53 100644
--- a/viz/src/server.rs
+++ b/viz/src/server.rs
@@ -48,7 +48,7 @@ impl<L> Server<L, TokioExecutor> {
 impl<L> IntoFuture for Server<L, TokioExecutor>
 where
     L: Accept + Send + 'static,
-    L::Conn: AsyncWrite + AsyncRead + Unpin + Send,
+    L::Conn: AsyncWrite + AsyncRead + Send + Unpin,
     L::Addr: Clone + Send + Sync + 'static,
 {
     type Output = Result<()>;
@@ -60,7 +60,6 @@ where
             listener,
             builder,
         } = self;
-
         Box::pin(async move {
             loop {
                 let (stream, remote_addr) = listener.accept().await?;