diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index 20a94216d6..6d8ac364a3 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -259,7 +259,7 @@ static int mov_write_wave_tag(ByteIOContext *pb, MOVTrack* track)
     return updateSize (pb, pos);
 }
 
-const CodecTag codec_movaudio_tags[] = {
+static const CodecTag codec_movaudio_tags[] = {
     { CODEC_ID_PCM_MULAW, MKTAG('u', 'l', 'a', 'w') },
     { CODEC_ID_PCM_ALAW, MKTAG('a', 'l', 'a', 'w') },
     { CODEC_ID_ADPCM_IMA_QT, MKTAG('i', 'm', 'a', '4') },
@@ -491,11 +491,12 @@ static int mov_write_esds_tag(ByteIOContext *pb, MOVTrack* track) // Basic
     return updateSize (pb, pos);
 }
 
-const CodecTag codec_movvideo_tags[] = {
+static const CodecTag codec_movvideo_tags[] = {
     { CODEC_ID_SVQ1, MKTAG('S', 'V', 'Q', '1') },
     { CODEC_ID_SVQ3, MKTAG('S', 'V', 'Q', '3') },
     { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
     { CODEC_ID_H263, MKTAG('s', '2', '6', '3') },
+    { CODEC_ID_H264, MKTAG('a', 'v', 'c', '1') },
     { CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'c', ' ') },
     { 0, 0 },
 };