diff --git a/sys/dev/gpio/acpi_gpiobus.c b/sys/dev/gpio/acpi_gpiobus.c
--- a/sys/dev/gpio/acpi_gpiobus.c
+++ b/sys/dev/gpio/acpi_gpiobus.c
@@ -383,7 +383,8 @@
 }
 
 static int
-acpi_gpiobus_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
+acpi_gpiobus_read_ivar(device_t dev, device_t child, int which,
+    uintptr_t *result)
 {
 	struct acpi_gpiobus_ivar *devi = device_get_ivars(child);