diff --git a/sys/dev/pckbport/synaptics.c b/sys/dev/pckbport/synaptics.c
index 6712973d1494..e652546b9c7b 100644
--- a/sys/dev/pckbport/synaptics.c
+++ b/sys/dev/pckbport/synaptics.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: synaptics.c,v 1.21 2008/04/30 14:07:14 ad Exp $	*/
+/*	$NetBSD: synaptics.c,v 1.22 2010/03/21 19:53:52 plunky Exp $	*/
 
 /*
  * Copyright (c) 2005, Steve C. Woodford
@@ -48,7 +48,7 @@
 #include "opt_pms.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: synaptics.c,v 1.21 2008/04/30 14:07:14 ad Exp $");
+__KERNEL_RCSID(0, "$NetBSD: synaptics.c,v 1.22 2010/03/21 19:53:52 plunky Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -286,7 +286,7 @@ pms_synaptics_enable(void *vsc)
 	res = pms_synaptics_send_command(psc->sc_kbctag, psc->sc_kbcslot,
 	    SYNAPTICS_MODE_ABSOLUTE | SYNAPTICS_MODE_W | SYNAPTICS_MODE_RATE);
 	cmd[0] = PMS_SET_SAMPLE;
-	cmd[1] = 0x14; /* doit */
+	cmd[1] = SYNAPTICS_CMD_SET_MODE2;
 	res |= pckbport_enqueue_cmd(psc->sc_kbctag, psc->sc_kbcslot, cmd, 2, 0,
 	    1, NULL);
 	sc->up_down = 0;
diff --git a/sys/dev/pckbport/synapticsreg.h b/sys/dev/pckbport/synapticsreg.h
index c9c5d6e73570..3a733cf863ba 100644
--- a/sys/dev/pckbport/synapticsreg.h
+++ b/sys/dev/pckbport/synapticsreg.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: synapticsreg.h,v 1.5 2007/01/17 23:14:03 uwe Exp $	*/
+/*	$NetBSD: synapticsreg.h,v 1.6 2010/03/21 19:53:52 plunky Exp $	*/
 
 /*
  * Copyright (c) 2005, Steve C. Woodford
@@ -45,6 +45,10 @@
 #define SYNAPTICS_READ_MODEL_ID		0x3
 #define SYNAPTICS_EXTENDED_QUERY	0x9
 
+/* Synaptics special commands */
+#define SYNAPTICS_CMD_SET_MODE2		0x14
+#define SYNAPTICS_CMD_CLIENT_CMD	0x28
+
 /* Magic numbers. */
 #define SYNAPTICS_MIN_VERSION		45 /* 4.5 */
 #define SYNAPTICS_MAGIC_BYTE		0x47
@@ -64,6 +68,7 @@
 #define SYNAPTICS_MODE_RATE		(1 << 6)
 #define SYNAPTICS_MODE_SLEEP		(1 << 3)
 #define SYNAPTICS_MODE_GEST		(1 << 2)
+#define SYNAPTICS_MODE_4BYTE_CLIENT	(1 << 1)
 #define SYNAPTICS_MODE_W		(1)
 
 /* Extended mode button masks. */