diff --git a/README.md b/README.md
index 7bc813418b..bf7ce35237 100644
--- a/README.md
+++ b/README.md
@@ -232,7 +232,7 @@ use sqlx::postgres::PgPoolOptions;
 // use sqlx::mysql::MySqlPoolOptions;
 // etc.
 
-#[async_std::main]
+#[async_std::main] // Requires the `attributes` feature of `async-std`
 // or #[tokio::main]
 // or #[actix_web::main]
 async fn main() -> Result<(), sqlx::Error> {
@@ -255,6 +255,7 @@ async fn main() -> Result<(), sqlx::Error> {
 }
 ```
 
+
 ### Connecting
 
 A single connection can be established using any of the database connection types and calling `connect()`.