diff --git a/sys/arch/hp700/include/cpu.h b/sys/arch/hp700/include/cpu.h
index 3c61abb13eee..cb998aa2c025 100644
--- a/sys/arch/hp700/include/cpu.h
+++ b/sys/arch/hp700/include/cpu.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: cpu.h,v 1.66 2011/02/07 12:19:35 skrll Exp $	*/
+/*	$NetBSD: cpu.h,v 1.67 2012/01/20 06:50:00 skrll Exp $	*/
 
 /*	$OpenBSD: cpu.h,v 1.55 2008/07/23 17:39:35 kettenis Exp $	*/
 
@@ -253,6 +253,7 @@ int	clock_intr(void *);
  * entry within the cpu_info struct.
  */
 struct cpu_info {
+	/* Keep this first to simplify the trap handlers */
 	register_t	ci_trapsave[16];/* the "phys" part of frame */
 
 	struct cpu_data ci_data;	/* MI per-cpu data */