diff --git a/src/mame/drivers/ampoker2.cpp b/src/mame/drivers/ampoker2.cpp
index 41f2e2958a2..207b150f3b2 100644
--- a/src/mame/drivers/ampoker2.cpp
+++ b/src/mame/drivers/ampoker2.cpp
@@ -1,5 +1,5 @@
 // license:BSD-3-Clause
-// copyright-holders:Roberto Fresca
+// copyright-holders:Roberto Fresca, Grull Osgo
 /********************************************************************************
 
   AMERICAN POKER 2
diff --git a/src/mame/includes/ampoker2.h b/src/mame/includes/ampoker2.h
index bd92c69d9db..6e77dae2490 100644
--- a/src/mame/includes/ampoker2.h
+++ b/src/mame/includes/ampoker2.h
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
-// copyright-holders:Roberto Fresca
+// copyright-holders:Roberto Fresca, Grull Osgo
+
 #ifndef MAME_INCLUDES_AMPOKER2_H
 #define MAME_INCLUDES_AMPOKER2_H