diff --git a/part/signaturepartutils.cpp b/part/signaturepartutils.cpp
index a39fcc618..e82a3cae2 100644
--- a/part/signaturepartutils.cpp
+++ b/part/signaturepartutils.cpp
@@ -1,5 +1,7 @@
 /*
     SPDX-FileCopyrightText: 2018 Chinmoy Ranjan Pradhan <chinmoyrp65@gmail.com>
+    SPDX-FileCopyrightText: 2023 g10 Code GmbH
+    SPDX-FileContributor: Sune Stolborg Vuorela <sune@vuorela.dk>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
diff --git a/part/signaturepartutils.h b/part/signaturepartutils.h
index 5e335a1a8..4912992b5 100644
--- a/part/signaturepartutils.h
+++ b/part/signaturepartutils.h
@@ -1,5 +1,7 @@
 /*
     SPDX-FileCopyrightText: 2018 Chinmoy Ranjan Pradhan <chinmoyrp65@gmail.com>
+    SPDX-FileCopyrightText: 2023 g10 Code GmbH
+    SPDX-FileContributor: Sune Stolborg Vuorela <sune@vuorela.dk>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */