diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c
index 19a61136..88eb143 100644
--- a/drivers/acpi/dock.c
+++ b/drivers/acpi/dock.c
@@ -43,7 +43,7 @@
 MODULE_DESCRIPTION(ACPI_DOCK_DRIVER_DESCRIPTION);
 MODULE_LICENSE("GPL");
 
-static int immediate_undock = 1;
+static bool immediate_undock = 1;
 module_param(immediate_undock, bool, 0644);
 MODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to "
 	"undock immediately when the undock button is pressed, 0 will cause"