diff --git a/src/mame/drivers/glasgow.cpp b/src/mame/drivers/glasgow.cpp
index fdae6797e72..d94a65ef70c 100644
--- a/src/mame/drivers/glasgow.cpp
+++ b/src/mame/drivers/glasgow.cpp
@@ -1,5 +1,5 @@
 // license:LGPL-2.1+
-// copyright-holders:Dirk Verwiebe, Robbbert, Ralf Schaefer, Cowering
+// copyright-holders:Dirk Verwiebe, Robbbert, Cowering
 /***************************************************************************
 Mephisto Glasgow 3 S chess computer
 Dirk V.
diff --git a/src/mame/drivers/mmodular.cpp b/src/mame/drivers/mmodular.cpp
index 04607a20522..e1ff1b638e4 100644
--- a/src/mame/drivers/mmodular.cpp
+++ b/src/mame/drivers/mmodular.cpp
@@ -1,5 +1,5 @@
 // license:LGPL-2.1+
-// copyright-holders:Dirk Verwiebe, Ralf Schaefer, Cowering
+// copyright-holders:Dirk Verwiebe, Cowering
 /******************************************************************************
  Mephisto Chess Computers using plugin modules
 
diff --git a/src/mame/drivers/supercon.cpp b/src/mame/drivers/supercon.cpp
index b880c7c35a0..35c1913fcc5 100644
--- a/src/mame/drivers/supercon.cpp
+++ b/src/mame/drivers/supercon.cpp
@@ -1,4 +1,4 @@
-// license:LGPL-2.1+
+// license:???
 // copyright-holders:Ralf Schaefer, Robbbert
 /******************************************************************************
  Novag SuperConstellation Chess Computer
diff --git a/src/mame/includes/mboard.h b/src/mame/includes/mboard.h
index d25cff0ea96..b6e8c5028f4 100644
--- a/src/mame/includes/mboard.h
+++ b/src/mame/includes/mboard.h
@@ -1,4 +1,4 @@
-// license:LGPL-2.1+
+// license:???
 // copyright-holders:Ralf Schaefer, Cowering
 /**********************************************************************
 
diff --git a/src/mame/machine/mboard.cpp b/src/mame/machine/mboard.cpp
index dc44bd666cb..1ea5963a3ab 100644
--- a/src/mame/machine/mboard.cpp
+++ b/src/mame/machine/mboard.cpp
@@ -1,4 +1,4 @@
-// license:LGPL-2.1+
+// license:???
 // copyright-holders:Ralf Schaefer, Cowering
 /**********************************************************************