diff --git a/tonic/src/transport/server.rs b/tonic/src/transport/server.rs
index c43bf4c..078406e 100644
--- a/tonic/src/transport/server.rs
+++ b/tonic/src/transport/server.rs
@@ -35,7 +35,7 @@ type Interceptor = Arc<dyn Layer<BoxService, Service = BoxService> + Send + Sync
 /// wanting to create a more complex and/or specific implementation.
 #[derive(Debug)]
 pub struct Server {
-    _p: ()
+    _p: (),
 }
 
 impl Server {