Index: head/sys/dev/ppbus/ppb_1284.c
===================================================================
--- head/sys/dev/ppbus/ppb_1284.c
+++ head/sys/dev/ppbus/ppb_1284.c
@@ -57,13 +57,13 @@
  * Wait for the peripherial up to 40ms
  */
 static int
-do_1284_wait(device_t bus, char mask, char status)
+do_1284_wait(device_t bus, uint8_t mask, uint8_t status)
 {
 	return (ppb_poll_bus(bus, 4, mask, status, PPB_NOINTR | PPB_POLL));
 }
 
 static int
-do_peripheral_wait(device_t bus, char mask, char status)
+do_peripheral_wait(device_t bus, uint8_t mask, uint8_t status)
 {
 	return (ppb_poll_bus(bus, 100, mask, status, PPB_NOINTR | PPB_POLL));
 }
Index: head/sys/dev/ppbus/ppb_base.c
===================================================================
--- head/sys/dev/ppbus/ppb_base.c
+++ head/sys/dev/ppbus/ppb_base.c
@@ -54,11 +54,11 @@
  */
 int
 ppb_poll_bus(device_t bus, int max,
-	     char mask, char status, int how)
+	     uint8_t mask, uint8_t status, int how)
 {
 	struct ppb_data *ppb = DEVTOSOFTC(bus);
 	int i, j, error;
-	char r;
+	uint8_t r;
 
 	ppb_assert_locked(bus);
 
@@ -186,7 +186,7 @@
 int
 ppb_get_status(device_t bus, struct ppb_status *status)
 {
-	register char r;
+	uint8_t r;
 
 	ppb_assert_locked(bus);
 
Index: head/sys/dev/ppbus/ppbconf.h
===================================================================
--- head/sys/dev/ppbus/ppbconf.h
+++ head/sys/dev/ppbus/ppbconf.h
@@ -263,7 +263,7 @@
 extern void ppb_init_callout(device_t, struct callout *, int);
 extern int ppb_sleep(device_t, void *, int, const char *, int);
 extern int ppb_get_status(device_t, struct ppb_status *);
-extern int ppb_poll_bus(device_t, int, char, char, int);
+extern int ppb_poll_bus(device_t, int, uint8_t, uint8_t, int);
 extern int ppb_reset_epp_timeout(device_t);
 extern int ppb_ecp_sync(device_t);
 extern int ppb_get_epp_protocol(device_t);