diff --git a/libavformat/cafdec.c b/libavformat/cafdec.c
index 657462311e..0034f001d0 100644
--- a/libavformat/cafdec.c
+++ b/libavformat/cafdec.c
@@ -109,10 +109,9 @@ static int read_kuki_chunk(AVFormatContext *s, int64_t size)
            The lavc AAC decoder requires the data from the codec specific
            description as extradata input. */
         int strt, skip;
-        MOVAtom atom;
 
         strt = avio_tell(pb);
-        ff_mov_read_esds(s, pb, atom);
+        ff_mov_read_esds(s, pb);
         skip = size - (avio_tell(pb) - strt);
         if (skip < 0 || !st->codec->extradata ||
             st->codec->codec_id != AV_CODEC_ID_AAC) {
diff --git a/libavformat/isom.h b/libavformat/isom.h
index 70064bc176..0bc912a437 100644
--- a/libavformat/isom.h
+++ b/libavformat/isom.h
@@ -215,7 +215,7 @@ void ff_mp4_parse_es_descr(AVIOContext *pb, int *es_id);
      (tag) == MKTAG('A', 'V', 'i', 'n'))
 
 
-int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom);
+int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb);
 enum AVCodecID ff_mov_get_lpcm_codec_id(int bps, int flags);
 
 int ff_mov_read_stsd_entries(MOVContext *c, AVIOContext *pb, int entries);
diff --git a/libavformat/mov.c b/libavformat/mov.c
index 3ab6776628..3734689fd1 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -543,7 +543,7 @@ static int mov_read_hdlr(MOVContext *c, AVIOContext *pb, MOVAtom atom)
     return 0;
 }
 
-int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom)
+int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb)
 {
     AVStream *st;
     int tag;
@@ -567,7 +567,7 @@ int ff_mov_read_esds(AVFormatContext *fc, AVIOContext *pb, MOVAtom atom)
 
 static int mov_read_esds(MOVContext *c, AVIOContext *pb, MOVAtom atom)
 {
-    return ff_mov_read_esds(c->fc, pb, atom);
+    return ff_mov_read_esds(c->fc, pb);
 }
 
 static int mov_read_dac3(MOVContext *c, AVIOContext *pb, MOVAtom atom)