diff --git a/libmpdemux/demux_lavf.c b/libmpdemux/demux_lavf.c
index edb2b2e94c..135909efa4 100644
--- a/libmpdemux/demux_lavf.c
+++ b/libmpdemux/demux_lavf.c
@@ -95,6 +95,7 @@ static const AVCodecTag mp_wav_tags[] = {
     { CODEC_ID_QDM2,              MKTAG('Q', 'D', 'M', '2')},
     { CODEC_ID_ROQ_DPCM,          MKTAG('R', 'o', 'Q', 'A')},
     { CODEC_ID_SHORTEN,           MKTAG('s', 'h', 'r', 'n')},
+    { CODEC_ID_SPEEX,             MKTAG('s', 'p', 'x', ' ')},
     { CODEC_ID_TTA,               MKTAG('T', 'T', 'A', '1')},
     { CODEC_ID_WAVPACK,           MKTAG('W', 'V', 'P', 'K')},
     { CODEC_ID_WESTWOOD_SND1,     MKTAG('S', 'N', 'D', '1')},