diff --git a/src/alsa_stubs.c b/src/alsa_stubs.c
index cd68d8d..2ff0e86 100644
--- a/src/alsa_stubs.c
+++ b/src/alsa_stubs.c
@@ -228,7 +228,6 @@ static struct custom_operations hw_params_ops =
 
 static value create_hw_params()
 {
-  CAMLlocal1(ans);
   snd_pcm_hw_params_t *params;
 
   check_for_err(snd_pcm_hw_params_malloc(&params));