diff --git a/examples/sound-c/main.c b/examples/sound-c/main.c
index ebb0623..6519cba 100644
--- a/examples/sound-c/main.c
+++ b/examples/sound-c/main.c
@@ -23,7 +23,7 @@ static int run() {
   struct fenster_audio fa = {0};
   fenster_open(&f);
   fenster_audio_open(&fa);
-  uint32_t t, u = 0;
+  uint32_t t = 0, u = 0;
   float audio[FENSTER_AUDIO_BUFSZ];
   int64_t now = fenster_time();
   while (fenster_loop(&f) == 0) {
diff --git a/fenster_audio.h b/fenster_audio.h
index 2deea72..2e20bd0 100644
--- a/fenster_audio.h
+++ b/fenster_audio.h
@@ -72,6 +72,7 @@ FENSTER_API int fenster_audio_open(struct fenster_audio *fa) {
     AudioQueueEnqueueBuffer(fa->queue, buffer, 0, NULL);
   }
   AudioQueueStart(fa->queue, NULL);
+  return 0;
 }
 FENSTER_API void fenster_audio_close(struct fenster_audio *fa) {
   AudioQueueStop(fa->queue, false);