diff --git a/src/main.rs b/src/main.rs
index a95a09d..6e97067 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -56,7 +56,11 @@ struct VerifyArgs {}
 #[derive(FromArgs, PartialEq, Debug)]
 #[argh(subcommand, name = "watch")]
 /// Reruns `verify` when files were edited
-struct WatchArgs {}
+struct WatchArgs {
+    #[argh(positional)]
+    /// the name of the exercise at which start to watch
+    name: String
+}
 
 #[derive(FromArgs, PartialEq, Debug)]
 #[argh(subcommand, name = "run")]