diff --git a/src/spicelib/devices/dio/dio.c b/src/spicelib/devices/dio/dio.c
index 49293e248..e39b27a39 100644
--- a/src/spicelib/devices/dio/dio.c
+++ b/src/spicelib/devices/dio/dio.c
@@ -1,7 +1,7 @@
 /**********
 Copyright 1990 Regents of the University of California.  All rights reserved.
 Author: 1985 Thomas L. Quarles
-Modified by Paolo Nenzi 2003 and Dietmar Warning 2012
+Modified by Paolo Nenzi 2003, Dietmar Warning 2012 and Arpad Buermen 2025
 **********/
 
 #include "ngspice/ngspice.h"
diff --git a/src/spicelib/devices/dio/diodefs.h b/src/spicelib/devices/dio/diodefs.h
index 85dff9e44..0f3892b4d 100644
--- a/src/spicelib/devices/dio/diodefs.h
+++ b/src/spicelib/devices/dio/diodefs.h
@@ -1,7 +1,7 @@
 /**********
 Copyright 1990 Regents of the University of California.  All rights reserved.
 Author: 1985 Thomas L. Quarles
-Modified by Paolo Nenzi 2003 and Dietmar Warning 2012
+Modified by Paolo Nenzi 2003, Dietmar Warning 2012 and Arpad Buermen 2025
 **********/
 #ifndef DIO
 #define DIO
diff --git a/src/spicelib/devices/dio/dioload.c b/src/spicelib/devices/dio/dioload.c
index b46014f8f..60f74484e 100644
--- a/src/spicelib/devices/dio/dioload.c
+++ b/src/spicelib/devices/dio/dioload.c
@@ -2,7 +2,7 @@
 Copyright 1990 Regents of the University of California.  All rights reserved.
 Author: 1985 Thomas L. Quarles
 Modified: 2000 AlansFixes
-Modified by Paolo Nenzi 2003 and Dietmar Warning 2012
+Modified by Paolo Nenzi 2003, Dietmar Warning 2012 and Arpad Buermen 2025
 **********/
 
 #include "ngspice/ngspice.h"
diff --git a/src/spicelib/devices/dio/diomask.c b/src/spicelib/devices/dio/diomask.c
index c9f408655..7c409cd8b 100644
--- a/src/spicelib/devices/dio/diomask.c
+++ b/src/spicelib/devices/dio/diomask.c
@@ -1,7 +1,7 @@
 /**********
 Copyright 1990 Regents of the University of California.  All rights reserved.
 Author: 1985 Thomas L. Quarles
-Modified by Paolo Nenzi 2003 and Dietmar Warning 2012
+Modified by Paolo Nenzi 2003, Dietmar Warning 2012 and Arpad Buermen 2025
 **********/
 /*
  */
diff --git a/src/spicelib/devices/dio/diompar.c b/src/spicelib/devices/dio/diompar.c
index 43fac8c03..26d1b0582 100644
--- a/src/spicelib/devices/dio/diompar.c
+++ b/src/spicelib/devices/dio/diompar.c
@@ -1,7 +1,7 @@
 /**********
 Copyright 1990 Regents of the University of California.  All rights reserved.
 Author: 1985 Thomas L. Quarles
-Modified by Paolo Nenzi 2003 and Dietmar Warning 2012
+Modified by Paolo Nenzi 2003, Dietmar Warning 2012 and Arpad Buermen 2025
 **********/
 /*
  */
diff --git a/src/spicelib/devices/dio/diosetup.c b/src/spicelib/devices/dio/diosetup.c
index 91da9097a..04a0f93a3 100644
--- a/src/spicelib/devices/dio/diosetup.c
+++ b/src/spicelib/devices/dio/diosetup.c
@@ -2,7 +2,7 @@
 Copyright 1990 Regents of the University of California.  All rights reserved.
 Author: 1985 Thomas L. Quarles
 Modified: 2000 AlansFixes
-Modified by Paolo Nenzi 2003 and Dietmar Warning 2012
+Modified by Paolo Nenzi 2003, Dietmar Warning 2012 and Arpad Buermen 2025
 **********/
 
 /* load the diode structure with those pointers needed later