diff --git a/src/audio/pitchrecog.c b/src/audio/pitchrecog.c
index 80c246e..3c0b200 100644
--- a/src/audio/pitchrecog.c
+++ b/src/audio/pitchrecog.c
@@ -330,8 +330,17 @@ pitchrecog (float **input, float **output, int nframes)
 return Stop;
 }
 
+#ifdef _HAVE_PORTAUDIO_
 extern int pa_main (aubio_process_func_t process_func);
+#else
+int
+pa_main (AubioCallback * fn)
+{
+  fprintf (stderr, "portaudio support not compiled\n");
+  return -1;
 
+}
+#endif
 
 #define START  init_aubio();return pa_main(pitchrecog);
 #define STOP   (void)pa_main(NULL);aubio_finish();