diff --git a/libmpdemux/demux_lavf.c b/libmpdemux/demux_lavf.c
index bc832b3c7e..6c5840f318 100644
--- a/libmpdemux/demux_lavf.c
+++ b/libmpdemux/demux_lavf.c
@@ -221,11 +221,19 @@ int demux_open_lavf(demuxer_t *demuxer){
               case CODEC_ID_PCM_S8:
               case CODEC_ID_PCM_U8:
                 sh_audio->samplesize = 1;
+                break;
               case CODEC_ID_PCM_S16LE:
               case CODEC_ID_PCM_S16BE:
               case CODEC_ID_PCM_U16LE:
               case CODEC_ID_PCM_U16BE:
                 sh_audio->samplesize = 2;
+                break;
+              case CODEC_ID_PCM_ALAW:
+                sh_audio->format = 0x6;
+                break;
+              case CODEC_ID_PCM_MULAW:
+                sh_audio->format = 0x7;
+                break;
             }
             if(verbose>=1) print_wave_header(sh_audio->wf);
             if(demuxer->audio->id != i && demuxer->audio->id != -1)