diff --git a/port/posix-h4-bcm/main.c b/port/posix-h4-bcm/main.c
index c7677c932..6ff2de886 100644
--- a/port/posix-h4-bcm/main.c
+++ b/port/posix-h4-bcm/main.c
@@ -69,6 +69,7 @@
 #include "hci_transport_h4.h"
 #include "hci_dump_posix_fs.h"
 #include "hci_dump_posix_stdout.h"
+#include "btstack_audio.h"
 
 
 int btstack_main(int argc, const char * argv[]);
@@ -218,6 +219,11 @@ static void phase2(int status){
 
     printf("Phase 2: Main app\n");
 
+#ifdef HAVE_PORTAUDIO
+    btstack_audio_sink_set_instance(btstack_audio_portaudio_sink_get_instance());
+    btstack_audio_source_set_instance(btstack_audio_portaudio_source_get_instance());
+#endif
+
     // setup app
     btstack_main(main_argc, main_argv);
 }