diff --git a/drivers/char/hvc_xen.c b/drivers/char/hvc_xen.c
index 60446f8..6b8e6d1 100644
--- a/drivers/char/hvc_xen.c
+++ b/drivers/char/hvc_xen.c
@@ -74,7 +74,8 @@
 	wmb();			/* write ring before updating pointer */
 	intf->out_prod = prod;
 
-	notify_daemon();
+	if (sent)
+		notify_daemon();
 	return sent;
 }