diff --git a/sys/arch/hp300/hp300/locore.s b/sys/arch/hp300/hp300/locore.s
index df4d7b7be51e..b6570bb81a3c 100644
--- a/sys/arch/hp300/hp300/locore.s
+++ b/sys/arch/hp300/hp300/locore.s
@@ -1,4 +1,4 @@
-/*	$NetBSD: locore.s,v 1.142 2008/01/07 16:55:15 joerg Exp $	*/
+/*	$NetBSD: locore.s,v 1.143 2008/01/28 16:21:19 tsutsui Exp $	*/
 
 /*
  * Copyright (c) 1980, 1990, 1993
@@ -1071,6 +1071,7 @@ ENTRY_NOPROFILE(intrhand)	/* levels 1 through 5 */
 
 ENTRY_NOPROFILE(lev6intr)	/* level 6: clock */
 	INTERRUPT_SAVEREG
+	addql	#1,_C_LABEL(idepth)	| entering interrupt
 	CLKADDR(%a0)
 	movb	%a0@(CLKSR),%d0		| read clock status
 Lclkagain:
@@ -1132,6 +1133,7 @@ Lrecheck:
 	addql	#1,_C_LABEL(uvmexp)+UVMEXP_INTRS | chalk up another interrupt
 	movb	%a0@(CLKSR),%d0		| see if anything happened
 	jmi	Lclkagain		|  while we were in hardclock/statintr
+	subql	#1,_C_LABEL(idepth)	| exiting from interrupt
 	INTERRUPT_RESTOREREG
 	jra	_ASM_LABEL(rei)		| all done
 
diff --git a/sys/arch/hp300/include/cpu.h b/sys/arch/hp300/include/cpu.h
index d42975f5239c..8f38bad55f8c 100644
--- a/sys/arch/hp300/include/cpu.h
+++ b/sys/arch/hp300/include/cpu.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: cpu.h,v 1.57 2007/10/17 19:54:25 garbled Exp $	*/
+/*	$NetBSD: cpu.h,v 1.58 2008/01/28 16:21:20 tsutsui Exp $	*/
 
 /*
  * Copyright (c) 1982, 1990, 1993
@@ -141,7 +141,8 @@ struct clockframe {
 #define	CLKF_INTR(framep)	(((framep)->sr & PSL_M) == 0)
 #else
 /* but until we start using PSL_M, we have to do this instead */
-#define	CLKF_INTR(framep)	(0)	/* XXX */
+#include <machine/intr.h>
+#define	CLKF_INTR(framep)	(idepth > 1)	/* XXX */
 #endif
 
 
diff --git a/sys/arch/hp300/include/intr.h b/sys/arch/hp300/include/intr.h
index cbc3bc6b823b..dcc89cd04fa6 100644
--- a/sys/arch/hp300/include/intr.h
+++ b/sys/arch/hp300/include/intr.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: intr.h,v 1.26 2007/12/03 15:33:39 ad Exp $	*/
+/*	$NetBSD: intr.h,v 1.27 2008/01/28 16:21:20 tsutsui Exp $	*/
 
 /*-
  * Copyright (c) 1996, 1997, 1999 The NetBSD Foundation, Inc.
@@ -69,6 +69,7 @@
 #define	PSLTOIPL(x)	(((x) >> 8) & 0xf)
 #define	IPLTOPSL(x)	((((x) & 0xf) << 8) | PSL_S)
 
+extern int idepth;
 extern u_short hp300_ipl2psl[];
 
 typedef int ipl_t;