diff --git a/libavformat/timefilter.c b/libavformat/timefilter.c
index 0c3099d607..e794021772 100644
--- a/libavformat/timefilter.c
+++ b/libavformat/timefilter.c
@@ -1,7 +1,9 @@
 /*
  * Delay Locked Loop based time filter
  * Copyright (c) 2009 Samalyse
+ * Copyright (c) 2009 Michael Niedermayer
  * Author: Olivier Guilyardi <olivier samalyse com>
+ *         Michael Niedermayer <michaelni gmx at>
  *
  * This file is part of FFmpeg.
  *
diff --git a/libavformat/timefilter.h b/libavformat/timefilter.h
index f3f16e1f6f..ded8ec7bed 100644
--- a/libavformat/timefilter.h
+++ b/libavformat/timefilter.h
@@ -1,7 +1,9 @@
 /*
  * Delay Locked Loop based time filter prototypes and declarations
  * Copyright (c) 2009 Samalyse
+ * Copyright (c) 2009 Michael Niedermayer
  * Author: Olivier Guilyardi <olivier samalyse com>
+ *         Michael Niedermayer <michaelni gmx at>
  *
  * This file is part of FFmpeg.
  *