diff --git a/src/mess/audio/upd1771.c b/src/mess/audio/upd1771.c
index 064522d30c0..eed88a4b199 100644
--- a/src/mess/audio/upd1771.c
+++ b/src/mess/audio/upd1771.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /**********************************************************************
 
diff --git a/src/mess/audio/upd1771.h b/src/mess/audio/upd1771.h
index 687309439fc..e0757757e9c 100644
--- a/src/mess/audio/upd1771.h
+++ b/src/mess/audio/upd1771.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /**********************************************************************
 
diff --git a/src/mess/audio/wswan_snd.c b/src/mess/audio/wswan_snd.c
index 0c0e04c80d3..77a21d7cb3b 100644
--- a/src/mess/audio/wswan_snd.c
+++ b/src/mess/audio/wswan_snd.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /**************************************************************************************
 
diff --git a/src/mess/audio/wswan_snd.h b/src/mess/audio/wswan_snd.h
index d72d6d7c59b..42ba3ed5160 100644
--- a/src/mess/audio/wswan_snd.h
+++ b/src/mess/audio/wswan_snd.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /*****************************************************************************
  *
diff --git a/src/mess/drivers/cfx9850.c b/src/mess/drivers/cfx9850.c
index d76c9891c54..7bf4d7b0edb 100644
--- a/src/mess/drivers/cfx9850.c
+++ b/src/mess/drivers/cfx9850.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /***************************************************************************
 
diff --git a/src/mess/drivers/electron.c b/src/mess/drivers/electron.c
index cc1efdee640..fbf8e10fe7d 100644
--- a/src/mess/drivers/electron.c
+++ b/src/mess/drivers/electron.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /******************************************************************************
     Acorn Electron driver
diff --git a/src/mess/drivers/fb01.c b/src/mess/drivers/fb01.c
index c4b4ae8e2b1..534f1b33235 100644
--- a/src/mess/drivers/fb01.c
+++ b/src/mess/drivers/fb01.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /***************************************************************************
 
diff --git a/src/mess/drivers/gamecom.c b/src/mess/drivers/gamecom.c
index adb20c166c1..d3149e3808d 100644
--- a/src/mess/drivers/gamecom.c
+++ b/src/mess/drivers/gamecom.c
@@ -1,4 +1,4 @@
-// license:MAME
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol, Robbbert
 /***************************************************************************
 
diff --git a/src/mess/drivers/gamepock.c b/src/mess/drivers/gamepock.c
index ce2f4d30cd5..dbf76dc1bf5 100644
--- a/src/mess/drivers/gamepock.c
+++ b/src/mess/drivers/gamepock.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 
 
diff --git a/src/mess/drivers/microvsn.c b/src/mess/drivers/microvsn.c
index a6015531ea9..72fb8984e34 100644
--- a/src/mess/drivers/microvsn.c
+++ b/src/mess/drivers/microvsn.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /***************************************************************************
 
diff --git a/src/mess/drivers/msx.c b/src/mess/drivers/msx.c
index 240733b3c1a..063b022b835 100644
--- a/src/mess/drivers/msx.c
+++ b/src/mess/drivers/msx.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /*
 ** msx.c : driver for MSX
diff --git a/src/mess/drivers/myvision.c b/src/mess/drivers/myvision.c
index 0bbc56f2c78..5881ebf8389 100644
--- a/src/mess/drivers/myvision.c
+++ b/src/mess/drivers/myvision.c
@@ -1,4 +1,4 @@
-// license:BSD
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /***************************************************************************
 
diff --git a/src/mess/drivers/nakajies.c b/src/mess/drivers/nakajies.c
index 77f8a67a390..e0771f1ce1e 100644
--- a/src/mess/drivers/nakajies.c
+++ b/src/mess/drivers/nakajies.c
@@ -1,4 +1,4 @@
-// license:?
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol,Sandro Ronco
 /******************************************************************************
 
diff --git a/src/mess/drivers/ngp.c b/src/mess/drivers/ngp.c
index d849459578b..21b8d1d7812 100644
--- a/src/mess/drivers/ngp.c
+++ b/src/mess/drivers/ngp.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /******************************************************************************
 
diff --git a/src/mess/drivers/osbexec.c b/src/mess/drivers/osbexec.c
index 3a17e2b310e..80323e29a0c 100644
--- a/src/mess/drivers/osbexec.c
+++ b/src/mess/drivers/osbexec.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /***************************************************************************
 
diff --git a/src/mess/drivers/pcfx.c b/src/mess/drivers/pcfx.c
index 21af58fe9c6..72b2374f5db 100644
--- a/src/mess/drivers/pcfx.c
+++ b/src/mess/drivers/pcfx.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /***************************************************************************
 
diff --git a/src/mess/drivers/phunsy.c b/src/mess/drivers/phunsy.c
index c292ba6a92f..ce2f031bf32 100644
--- a/src/mess/drivers/phunsy.c
+++ b/src/mess/drivers/phunsy.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /***************************************************************************
 
diff --git a/src/mess/drivers/pokemini.c b/src/mess/drivers/pokemini.c
index d503d5df917..98977a85c5a 100644
--- a/src/mess/drivers/pokemini.c
+++ b/src/mess/drivers/pokemini.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /********************************************************************
 
diff --git a/src/mess/drivers/pv1000.c b/src/mess/drivers/pv1000.c
index d8bcfc504bb..636a2fd328d 100644
--- a/src/mess/drivers/pv1000.c
+++ b/src/mess/drivers/pv1000.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /***************************************************************************
 
diff --git a/src/mess/drivers/pv2000.c b/src/mess/drivers/pv2000.c
index 103cadc718a..64432acb994 100644
--- a/src/mess/drivers/pv2000.c
+++ b/src/mess/drivers/pv2000.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /*
 
diff --git a/src/mess/drivers/rm380z.c b/src/mess/drivers/rm380z.c
index cc60901a09c..5ec4ba53d21 100644
--- a/src/mess/drivers/rm380z.c
+++ b/src/mess/drivers/rm380z.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol,friol
 /*
 
diff --git a/src/mess/drivers/scv.c b/src/mess/drivers/scv.c
index 3c9297c8673..98d21b82846 100644
--- a/src/mess/drivers/scv.c
+++ b/src/mess/drivers/scv.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /***************************************************************************
 
diff --git a/src/mess/drivers/wswan.c b/src/mess/drivers/wswan.c
index 7f530e9c934..4e2c87c4f20 100644
--- a/src/mess/drivers/wswan.c
+++ b/src/mess/drivers/wswan.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
 /***************************************************************************