diff --git a/dec_audio.c b/dec_audio.c
index 6aaf27ebd8..714c04c5fb 100644
--- a/dec_audio.c
+++ b/dec_audio.c
@@ -22,6 +22,8 @@ extern int verbose; // defined in mplayer.c
 #include "alaw.c"
 #include "xa/xa_gsm.h"
 
+#include "loader/DirectShow/DS_AudioDec.h"
+
 static sh_audio_t* ac3_audio_sh=NULL;
 
 // AC3 decoder buffer callback:
@@ -39,6 +41,9 @@ int init_audio(sh_audio_t *sh_audio){
 
 int driver=sh_audio->codec->driver;
 
+extern int init_acm_audio_codec(sh_audio_t *sh_audio);
+extern int acm_decode_audio(sh_audio_t *sh_audio, void* a_buffer,int len);
+
 sh_audio->samplesize=2;
 sh_audio->samplerate=0;
 //sh_audio->pcm_bswap=0;