diff --git a/src/spicelib/devices/dio/dio.c b/src/spicelib/devices/dio/dio.c
index 4620efc71..c7b160f79 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 f4e54bb35..508051cc3 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 c5160209e..7c7f9fa54 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 b4f35d4af..f786f96c9 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 164d0186b..a6780034b 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 2cccd6144..867b7562c 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