diff --git a/src/bin/Disk.hx b/src/bin/Disk.hx
index 611edbc..f5d09c2 100644
--- a/src/bin/Disk.hx
+++ b/src/bin/Disk.hx
@@ -44,7 +44,7 @@ class Disk extends CLIAppBase {
 			}
 
 			return audioDiskPlayPause(args[0], false);
-		});
+		},"<drive>");
 
 		registerSyncSubcommand("eject", (args)->{
 			if (args.length < 1){