diff --git a/sys/arch/xen/x86/xen_intr.c b/sys/arch/xen/x86/xen_intr.c
index 6e618d895b03..4280075846f7 100644
--- a/sys/arch/xen/x86/xen_intr.c
+++ b/sys/arch/xen/x86/xen_intr.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: xen_intr.c,v 1.7 2008/05/25 16:09:30 bouyer Exp $	*/
+/*	$NetBSD: xen_intr.c,v 1.8 2008/07/01 18:44:50 bouyer Exp $	*/
 
 /*-
  * Copyright (c) 1998, 2001 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: xen_intr.c,v 1.7 2008/05/25 16:09:30 bouyer Exp $");
+__KERNEL_RCSID(0, "$NetBSD: xen_intr.c,v 1.8 2008/07/01 18:44:50 bouyer Exp $");
 
 #include <sys/param.h>
 
@@ -64,6 +64,9 @@ spllower(int nlevel)
 	uint32_t imask;
 	u_long psl;
 
+	if (ci->ci_ilevel <= nlevel)
+		return;
+
 	__insn_barrier();
 
 	imask = IUNMASK(ci, nlevel);