diff --git a/src/openvfs/openvfs.cpp b/src/openvfs/openvfs.cpp
index cbcaea8..34be212 100644
--- a/src/openvfs/openvfs.cpp
+++ b/src/openvfs/openvfs.cpp
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
+// SPDX-License-Identifier: GPL-3.0-or-later
 // SPDX-FileCopyrightText: 2025 Hannah von Reth <h.vonreth@opencloud.eu>
 
 #include "openvfs/openvfs.h"
diff --git a/src/openvfsfuse/main.cpp b/src/openvfsfuse/main.cpp
index 0b5577e..0a61b49 100644
--- a/src/openvfsfuse/main.cpp
+++ b/src/openvfsfuse/main.cpp
@@ -1,3 +1,7 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// SPDX-FileCopyrightText: 2025 Hannah von Reth <h.vonreth@opencloud.eu>
+// SPDX-FileCopyrightText: 2025 Klaas Freitag <k.freitag@opencloud.eu>
+
 #include "openvfsfuse.h"
 
 #include <cassert>
diff --git a/src/openvfsfuse/sharedmap.cpp b/src/openvfsfuse/sharedmap.cpp
index bf8163c..3c9bf5e 100644
--- a/src/openvfsfuse/sharedmap.cpp
+++ b/src/openvfsfuse/sharedmap.cpp
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// SPDX-FileCopyrightText: 2025 Klaas Freitag <k.freitag@opencloud.eu>
+
 /*
  * openvfsfuse - a Fuse layer to handle virtual filesystem items of cloud storage
  * Copyright (C) 2025  Klaas Freitag <k.freitag@opencloud.eu>
diff --git a/src/openvfsfuse/sharedmap.h b/src/openvfsfuse/sharedmap.h
index f761ed7..c43151c 100644
--- a/src/openvfsfuse/sharedmap.h
+++ b/src/openvfsfuse/sharedmap.h
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// SPDX-FileCopyrightText: 2025 Klaas Freitag <k.freitag@opencloud.eu>
+
 /*
  * openvfsfuse - a Fuse layer to handle virtual filesystem items of cloud storage
  * Copyright (C) 2025  Klaas Freitag <k.freitag@opencloud.eu>
diff --git a/src/openvfsfuse/strtools.h b/src/openvfsfuse/strtools.h
index 7610994..0d6fa87 100644
--- a/src/openvfsfuse/strtools.h
+++ b/src/openvfsfuse/strtools.h
@@ -1,9 +1,9 @@
-#ifndef STRTOOLS_H
-#define STRTOOLS_H
-
 // SPDX-License-Identifier: GPL-3.0-or-later
 // SPDX-FileCopyrightText: 2026 Klaas Freitag <k.freitag@opencloud.eu>
 
+#ifndef STRTOOLS_H
+#define STRTOOLS_H
+
 #pragma once
 #include <string>
 #include <vector>