diff --git a/sys/dev/sequencer.c b/sys/dev/sequencer.c
index 508d8d90ba95..90428e971144 100644
--- a/sys/dev/sequencer.c
+++ b/sys/dev/sequencer.c
@@ -746,8 +746,10 @@ sequencerioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l)
 
 	case FIOASYNC:
 		if (*(int *)addr) {
-			if (sc->async != 0)
-				return EBUSY;
+			if (sc->async != 0) {
+				error = EBUSY;
+				break;
+			}
 			sc->async = curproc->p_pid;
 			DPRINTF(("%s: FIOASYNC %d\n", __func__,
 			    sc->async));