diff --git a/sys/arch/amd64/amd64/cpufunc.S b/sys/arch/amd64/amd64/cpufunc.S
index eece9d28d6ea..14da5358ed2e 100644
--- a/sys/arch/amd64/amd64/cpufunc.S
+++ b/sys/arch/amd64/amd64/cpufunc.S
@@ -1,4 +1,4 @@
-/*	$NetBSD: cpufunc.S,v 1.11 2008/05/10 16:12:32 ad Exp $	*/
+/*	$NetBSD: cpufunc.S,v 1.12 2008/05/10 16:21:41 ad Exp $	*/
 
 /*-
  * Copyright (c) 1998, 2007, 2008 The NetBSD Foundation, Inc.
@@ -221,10 +221,12 @@ NENTRY(cpu_counter)
 	rdtsc
 	shlq	$32, %rdx
 	orq	%rdx, %rax
+	addq	CPUVAR(CC_SKEW), %rax
 	ret
 
 NENTRY(cpu_counter32)
 	rdtsc
+	addl	CPUVAR(CC_SKEW), %eax
 	ret
 
 NENTRY(rdpmc)
diff --git a/sys/arch/i386/i386/cpufunc.S b/sys/arch/i386/i386/cpufunc.S
index 46e072e817d5..ce2449d67f10 100644
--- a/sys/arch/i386/i386/cpufunc.S
+++ b/sys/arch/i386/i386/cpufunc.S
@@ -1,4 +1,4 @@
-/*	$NetBSD: cpufunc.S,v 1.10 2008/05/10 16:12:32 ad Exp $	*/
+/*	$NetBSD: cpufunc.S,v 1.11 2008/05/10 16:21:41 ad Exp $	*/
 
 /*-
  * Copyright (c) 1998, 2007 The NetBSD Foundation, Inc.
@@ -36,7 +36,7 @@
  */
 
 #include <machine/asm.h>
-__KERNEL_RCSID(0, "$NetBSD: cpufunc.S,v 1.10 2008/05/10 16:12:32 ad Exp $");
+__KERNEL_RCSID(0, "$NetBSD: cpufunc.S,v 1.11 2008/05/10 16:21:41 ad Exp $");
 
 #include "opt_xen.h"
 
@@ -143,11 +143,14 @@ END(wrmsr_locked)
 
 ENTRY(cpu_counter)
 	rdtsc
+	addl	CPUVAR(CC_SKEW), %eax
+	adcl	CPUVAR(CC_SKEW+4), %edx
 	ret
 END(cpu_counter)
 
 ENTRY(cpu_counter32)
 	rdtsc
+	addl	CPUVAR(CC_SKEW), %eax
 	ret
 END(cpu_counter32)