diff --git a/sys/arch/arm32/dev/pms.c b/sys/arch/arm32/dev/pms.c
index 50bb7eaae577..4c26bd7cb956 100644
--- a/sys/arch/arm32/dev/pms.c
+++ b/sys/arch/arm32/dev/pms.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: pms.c,v 1.15 1998/02/22 00:25:03 mark Exp $	*/
+/*	$NetBSD: pms.c,v 1.16 1998/07/06 00:43:28 mark Exp $	*/
 
 /*-
  * Copyright (c) 1996 D.C. Tsen
@@ -59,6 +59,8 @@
 #include <machine/mouse.h>
 #include <arm32/dev/pmsvar.h>
 
+#define MOUSE_IOC_ACK
+
 /* mouse commands */
 #define	PMS_SET_SCALE11	0xe6	/* set scaling 1:1 */
 #define	PMS_SET_SCALE21 0xe7	/* set scaling 2:1 */
diff --git a/sys/arch/arm32/dev/qms.c b/sys/arch/arm32/dev/qms.c
index 1501ae56206c..014861554de7 100644
--- a/sys/arch/arm32/dev/qms.c
+++ b/sys/arch/arm32/dev/qms.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: qms.c,v 1.18 1998/02/22 00:24:12 mark Exp $	*/
+/*	$NetBSD: qms.c,v 1.19 1998/07/06 00:43:28 mark Exp $	*/
 
 /*
  * Copyright (c) Scott Stevens 1995 All rights reserved
@@ -58,6 +58,8 @@
 #include <machine/mouse.h>
 #include <arm32/dev/qmsvar.h>
 
+#define MOUSE_IOC_ACK
+
 #define QMOUSE_BSIZE 12*64
 
 #ifdef MOUSE_IOC_ACK