diff --git a/src/mame/drivers/argus.c b/src/mame/drivers/argus.c
index c96adc02469..bb4da4494d1 100644
--- a/src/mame/drivers/argus.c
+++ b/src/mame/drivers/argus.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Yochizo
 /***************************************************************************
 
diff --git a/src/mame/drivers/exzisus.c b/src/mame/drivers/exzisus.c
index bf00cbcc4e9..0322ca8b72f 100644
--- a/src/mame/drivers/exzisus.c
+++ b/src/mame/drivers/exzisus.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Yochizo
 /***************************************************************************
 
diff --git a/src/mame/drivers/ninjakd2.c b/src/mame/drivers/ninjakd2.c
index 25d8f386d1c..7c1b3feeab8 100644
--- a/src/mame/drivers/ninjakd2.c
+++ b/src/mame/drivers/ninjakd2.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Roberto Ventura, Leandro Dardini, Yochizo, Nicola Salmoria
 /******************************************************************************
 
diff --git a/src/mame/drivers/srmp2.c b/src/mame/drivers/srmp2.c
index b1fe1c166eb..f3fb40cdd0d 100644
--- a/src/mame/drivers/srmp2.c
+++ b/src/mame/drivers/srmp2.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Yochizo, Takahiro Nogi
 /***************************************************************************
 
diff --git a/src/mame/drivers/taito_h.c b/src/mame/drivers/taito_h.c
index f45f88b8202..c6940176889 100644
--- a/src/mame/drivers/taito_h.c
+++ b/src/mame/drivers/taito_h.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Yochizo
 /***************************************************************************
 
diff --git a/src/mame/drivers/toaplan2.c b/src/mame/drivers/toaplan2.c
index baaed59f364..f704fde1ac2 100644
--- a/src/mame/drivers/toaplan2.c
+++ b/src/mame/drivers/toaplan2.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Quench, Yochizo, David Haywood
 /*****************************************************************************
 
diff --git a/src/mame/includes/argus.h b/src/mame/includes/argus.h
index 362c4e1aef7..9df650ef079 100644
--- a/src/mame/includes/argus.h
+++ b/src/mame/includes/argus.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Yochizo
 #include "video/jalblend.h"
 
diff --git a/src/mame/includes/exzisus.h b/src/mame/includes/exzisus.h
index 6fdc1fd10a0..3d8c00d5ebe 100644
--- a/src/mame/includes/exzisus.h
+++ b/src/mame/includes/exzisus.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Yochizo
 class exzisus_state : public driver_device
 {
diff --git a/src/mame/includes/ninjakd2.h b/src/mame/includes/ninjakd2.h
index f8a5f950604..b2d15ca1980 100644
--- a/src/mame/includes/ninjakd2.h
+++ b/src/mame/includes/ninjakd2.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Roberto Ventura, Leandro Dardini, Yochizo, Nicola Salmoria
 /******************************************************************************
 
diff --git a/src/mame/includes/srmp2.h b/src/mame/includes/srmp2.h
index e4d48edd5e1..6162c62b584 100644
--- a/src/mame/includes/srmp2.h
+++ b/src/mame/includes/srmp2.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Yochizo, Takahiro Nogi
 #include "sound/msm5205.h"
 #include "video/seta001.h"
diff --git a/src/mame/includes/taito_h.h b/src/mame/includes/taito_h.h
index 00bbf10bb91..d2b6ae0f845 100644
--- a/src/mame/includes/taito_h.h
+++ b/src/mame/includes/taito_h.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Yochizo
 /*************************************************************************
 
diff --git a/src/mame/includes/toaplan2.h b/src/mame/includes/toaplan2.h
index 354758b4002..85e5ccc0a0d 100644
--- a/src/mame/includes/toaplan2.h
+++ b/src/mame/includes/toaplan2.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Quench, Yochizo, David Haywood
 /**************** Machine stuff ******************/
 //#define USE_HD64x180          /* Define if CPU support is available */
diff --git a/src/mame/video/argus.c b/src/mame/video/argus.c
index ccd6530aa65..868fcec2947 100644
--- a/src/mame/video/argus.c
+++ b/src/mame/video/argus.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Yochizo
 /***************************************************************************
 
diff --git a/src/mame/video/exzisus.c b/src/mame/video/exzisus.c
index 9081509f6bb..5b255658bf1 100644
--- a/src/mame/video/exzisus.c
+++ b/src/mame/video/exzisus.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Yochizo
 /***************************************************************************
 
diff --git a/src/mame/video/ninjakd2.c b/src/mame/video/ninjakd2.c
index 8d168e67a1b..9ff710e57e4 100644
--- a/src/mame/video/ninjakd2.c
+++ b/src/mame/video/ninjakd2.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Roberto Ventura, Leandro Dardini, Yochizo, Nicola Salmoria
 /******************************************************************************
 
diff --git a/src/mame/video/srmp2.c b/src/mame/video/srmp2.c
index 0b1d8252fb4..8970d15dd3c 100644
--- a/src/mame/video/srmp2.c
+++ b/src/mame/video/srmp2.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Yochizo, Takahiro Nogi
 /***************************************************************************
 
diff --git a/src/mame/video/taito_h.c b/src/mame/video/taito_h.c
index 97a34a95d1f..80c6f8522dd 100644
--- a/src/mame/video/taito_h.c
+++ b/src/mame/video/taito_h.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Yochizo
 /***************************************************************************
 
diff --git a/src/mame/video/toaplan2.c b/src/mame/video/toaplan2.c
index 4a0b2f72a3e..b47d98d2015 100644
--- a/src/mame/video/toaplan2.c
+++ b/src/mame/video/toaplan2.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Quench, Yochizo, David Haywood
 /***************************************************************************