diff --git a/src/pcm/AudioCompress/compress.c b/src/pcm/AudioCompress/compress.c
index fd51ac3a3..9094bbe80 100644
--- a/src/pcm/AudioCompress/compress.c
+++ b/src/pcm/AudioCompress/compress.c
@@ -1,9 +1,5 @@
-/* compress.c
- * Compressor logic
- *
- * (c)2007 busybee (http://beesbuzz.biz/
- * Licensed under the terms of the LGPL. See the file COPYING for details.
- */
+// SPDX-License-Identifier: LGPL-2.1
+// (c)2007 busybee (http://beesbuzz.biz/
 
 #include <stdio.h>
 #include <stdint.h>
diff --git a/src/pcm/AudioCompress/compress.h b/src/pcm/AudioCompress/compress.h
index 8556d16be..4144e5dac 100644
--- a/src/pcm/AudioCompress/compress.h
+++ b/src/pcm/AudioCompress/compress.h
@@ -1,9 +1,5 @@
-/*! compress.h
- *  interface to audio compression
- *
- *  (c)2007 busybee (http://beesbuzz.biz/)
- *  Licensed under the terms of the LGPL. See the file COPYING for details.
- */
+// SPDX-License-Identifier: LGPL-2.1
+// (c)2007 busybee (http://beesbuzz.biz/
 
 #ifndef COMPRESS_H
 #define COMPRESS_H