diff --git a/libmpdemux/demux_audio.c b/libmpdemux/demux_audio.c
index 7f0bb5e55f..6d8b891cd7 100644
--- a/libmpdemux/demux_audio.c
+++ b/libmpdemux/demux_audio.c
@@ -414,8 +414,8 @@ static int demux_audio_open(demuxer_t* demuxer) {
       }
       stream_read(s,(char*)(w + 1),w->cbSize);
       l -= w->cbSize;
-      if (w->wFormatTag & 0xfffe && w->cbSize >= 22)
-          sh_audio->format = ((WAVEFORMATEXTENSIBLE *)w)->SubFormat;
+      if (w->wFormatTag == 0xfffe && w->cbSize >= 22)
+          sh_audio->format = av_le2ne16(((WAVEFORMATEXTENSIBLE *)w)->SubFormat);
     }
 
     if( mp_msg_test(MSGT_DEMUX,MSGL_V) ) print_wave_header(w, MSGL_V);