diff --git a/libavfilter/buffer.c b/libavfilter/buffer.c
index 32431c6d953a5e9f5e756c1799c4c45c2db50317..b878be518b6bc0270b9ea202e33e3ac3ee1e07c5 100644
--- a/libavfilter/buffer.c
+++ b/libavfilter/buffer.c
@@ -1,4 +1,8 @@
 /*
+ * Copyright Stefano Sabatini <stefasab gmail com>
+ * Copyright Anton Khirnov <anton khirnov net>
+ * Copyright Michael Niedermayer <michaelni gmx at>
+ *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or