ACPI_STATUS	acpi_Startup(void);
 void		acpi_UserNotify(const char *subsystem, ACPI_HANDLE h,
 		    uint8_t notify);
-int		acpi_bus_alloc_gas(device_t dev, int *type, int *rid,
+int		acpi_bus_alloc_gas(device_t dev, int *type, int rid,
 		    ACPI_GENERIC_ADDRESS *gas, struct resource **res,
 		    u_int flags);
 void		acpi_walk_subtables(void *first, void *end,
diff --git a/sys/dev/wdatwd/wdatwd.c b/sys/dev/wdatwd/wdatwd.c
index c67e37281307..8873dd74103c 100644
--- a/sys/dev/wdatwd/wdatwd.c
+++ b/sys/dev/wdatwd/wdatwd.c
@@ -612,7 +612,7 @@ wdatwd_probe(device_t dev)
 		int		type, rid = 0;
 		struct resource *res;
 
-		if (acpi_bus_alloc_gas(dev, &type, &rid,
+		if (acpi_bus_alloc_gas(dev, &type, rid,
 		    &((ACPI_WDAT_ENTRY *)(wdat + 1))->RegisterRegion,
 		    &res, 0))
 			return (ENXIO);