diff --git a/src/pcm/Normalizer.cxx b/src/pcm/Normalizer.cxx
index b5757adce..e97138b64 100644
--- a/src/pcm/Normalizer.cxx
+++ b/src/pcm/Normalizer.cxx
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: LGPL-2.1
+// SPDX-License-Identifier: LGPL-2.1-only
 // Copyright The Music Player Daemon Project
 // Based on AudioCompress (c)2007 busybee (http://beesbuzz.biz/
 
diff --git a/src/pcm/Normalizer.hxx b/src/pcm/Normalizer.hxx
index 911dd5d60..b91d67aef 100644
--- a/src/pcm/Normalizer.hxx
+++ b/src/pcm/Normalizer.hxx
@@ -1,4 +1,4 @@
-// SPDX-License-Identifier: LGPL-2.1
+// SPDX-License-Identifier: LGPL-2.1-only
 // Copyright The Music Player Daemon Project
 // Based on AudioCompress (c)2007 busybee (http://beesbuzz.biz/