diff --git a/src/sfizz/EQDescription.h b/src/sfizz/EQDescription.h
index ec3e4150..5953cf52 100644
--- a/src/sfizz/EQDescription.h
+++ b/src/sfizz/EQDescription.h
@@ -1,3 +1,9 @@
+// SPDX-License-Identifier: BSD-2-Clause
+
+// This code is part of the sfizz library and is licensed under a BSD 2-clause
+// license. You should have receive a LICENSE.md file along with the code.
+// If not, contact the sfizz maintainers at https://github.com/sfztools/sfizz
+
 #pragma once
 #include "Config.h"
 #include "Defaults.h"
diff --git a/src/sfizz/FilterDescription.h b/src/sfizz/FilterDescription.h
index 547e765b..b31e81e9 100644
--- a/src/sfizz/FilterDescription.h
+++ b/src/sfizz/FilterDescription.h
@@ -1,3 +1,9 @@
+// SPDX-License-Identifier: BSD-2-Clause
+
+// This code is part of the sfizz library and is licensed under a BSD 2-clause
+// license. You should have receive a LICENSE.md file along with the code.
+// If not, contact the sfizz maintainers at https://github.com/sfztools/sfizz
+
 #pragma once
 #include "Config.h"
 #include "Defaults.h"