diff --git a/src/mess/drivers/hp9k.c b/src/mess/drivers/hp9k.c
index bfdf79bc122..dcf426150dd 100644
--- a/src/mess/drivers/hp9k.c
+++ b/src/mess/drivers/hp9k.c
@@ -1,5 +1,5 @@
 // license:BSD-3-Clause
-// copyright-holders:F. Ulivi
+// copyright-holders:friol, F. Ulivi
 
 /***************************************************************************