diff --git a/src/emu/machine/corvushd.c b/src/emu/machine/corvushd.c
index 659945da93d..0444d3cb530 100644
--- a/src/emu/machine/corvushd.c
+++ b/src/emu/machine/corvushd.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Brett Wyer, Raphael Nabet
 //
 //  corvus_hd
diff --git a/src/emu/machine/corvushd.h b/src/emu/machine/corvushd.h
index 324fef4f1bf..bc83fa2585d 100644
--- a/src/emu/machine/corvushd.h
+++ b/src/emu/machine/corvushd.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Brett Wyer, Raphael Nabet
 /*****************************************************************************
  *
diff --git a/src/mame/drivers/mhavoc.c b/src/mame/drivers/mhavoc.c
index 1f60a84ed2e..dadecc517de 100644
--- a/src/mame/drivers/mhavoc.c
+++ b/src/mame/drivers/mhavoc.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Appolo
 /***************************************************************************
 
diff --git a/src/mame/drivers/vball.c b/src/mame/drivers/vball.c
index 31f75db4d14..c3effdc0277 100644
--- a/src/mame/drivers/vball.c
+++ b/src/mame/drivers/vball.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Paul Hampson
 /**********************************************************************************************************************
  Championship VBall
diff --git a/src/mame/includes/mhavoc.h b/src/mame/includes/mhavoc.h
index 5791828dde7..3fd48ca927a 100644
--- a/src/mame/includes/mhavoc.h
+++ b/src/mame/includes/mhavoc.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Appolo
 /*************************************************************************
 
diff --git a/src/mame/includes/vball.h b/src/mame/includes/vball.h
index 775052adafe..e43c3421430 100644
--- a/src/mame/includes/vball.h
+++ b/src/mame/includes/vball.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Paul Hampson
 class vball_state : public driver_device
 {
diff --git a/src/mame/machine/mhavoc.c b/src/mame/machine/mhavoc.c
index ccc1f146bc6..4c3a9dc2ab1 100644
--- a/src/mame/machine/mhavoc.c
+++ b/src/mame/machine/mhavoc.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Mike Appolo
 /***************************************************************************
 
diff --git a/src/mame/video/vball.c b/src/mame/video/vball.c
index 57ef5f8bbf3..8a7e8f9a26f 100644
--- a/src/mame/video/vball.c
+++ b/src/mame/video/vball.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Paul Hampson
 /***************************************************************************
 
diff --git a/src/mess/audio/gb.c b/src/mess/audio/gb.c
index 2ca82aa5657..71925f030bf 100644
--- a/src/mess/audio/gb.c
+++ b/src/mess/audio/gb.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Anthony Kruize
 /**************************************************************************************
 * Game Boy sound emulation (c) Anthony Kruize (trandor@labyrinth.net.au)
diff --git a/src/mess/audio/gb.h b/src/mess/audio/gb.h
index d8eb9d6109b..c86cad02b76 100644
--- a/src/mess/audio/gb.h
+++ b/src/mess/audio/gb.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Anthony Kruize
 #ifndef __GBSOUND_H__
 #define __GBSOUND_H__
diff --git a/src/mess/drivers/concept.c b/src/mess/drivers/concept.c
index 4d15dd5e213..a6245847686 100644
--- a/src/mess/drivers/concept.c
+++ b/src/mess/drivers/concept.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Raphael Nabet, Brett Wyer
 /*
     Corvus Concept driver
diff --git a/src/mess/drivers/gb.c b/src/mess/drivers/gb.c
index ffd2a304c30..97620173d3b 100644
--- a/src/mess/drivers/gb.c
+++ b/src/mess/drivers/gb.c
@@ -1,5 +1,5 @@
 // license:BSD-3-Clause
-// copyright-holders:Wilbert Pol
+// copyright-holders:Anthony Kruize,Wilbert Pol
 /***************************************************************************
 
   gb.c
diff --git a/src/mess/drivers/wswan.c b/src/mess/drivers/wswan.c
index 4e2c87c4f20..8a566a77858 100644
--- a/src/mess/drivers/wswan.c
+++ b/src/mess/drivers/wswan.c
@@ -1,5 +1,5 @@
 // license:BSD-3-Clause
-// copyright-holders:Wilbert Pol
+// copyright-holders:Anthony Kruize,Wilbert Pol
 /***************************************************************************
 
   wswan.c
diff --git a/src/mess/includes/concept.h b/src/mess/includes/concept.h
index 73dcb5f7e4e..9c0a5f74b92 100644
--- a/src/mess/includes/concept.h
+++ b/src/mess/includes/concept.h
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Raphael Nabet, Brett Wyer
 /*****************************************************************************
  *
diff --git a/src/mess/machine/concept.c b/src/mess/machine/concept.c
index 8c547c51903..3005eefb60b 100644
--- a/src/mess/machine/concept.c
+++ b/src/mess/machine/concept.c
@@ -1,4 +1,4 @@
-// license:???
+// license:BSD-3-Clause
 // copyright-holders:Raphael Nabet, Brett Wyer
 /*
     Corvus Concept driver
diff --git a/src/mess/machine/wswan.c b/src/mess/machine/wswan.c
index add6d7a525d..508f93e8544 100644
--- a/src/mess/machine/wswan.c
+++ b/src/mess/machine/wswan.c
@@ -1,5 +1,5 @@
 // license:BSD-3-Clause
-// copyright-holders:Wilbert Pol
+// copyright-holders:Anthony Kruize,Wilbert Pol
 /***************************************************************************
 
   wswan.c