diff --git a/ROM2/main_basic.c b/ROM2/main_basic.c
index 5fd7a857afe36d5f995ca785d7289f89a295c15a..381db9c73d32be3df260b57fc7ff31720e5750cd 100644
--- a/ROM2/main_basic.c
+++ b/ROM2/main_basic.c
@@ -236,7 +236,7 @@ void do_silence() {
 		send_string("511 Unknown silence duration." CRLF);
 		return;
 	}
-	send_string("500 Silence started." CRLF);
+	send_string("501 Silence started." CRLF);
 	return;
 }