diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 2242c10..6ef1692 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -94,6 +94,7 @@ typedef int (*acpi_op_start) (struct acpi_device * device);
 typedef int (*acpi_op_bind) (struct acpi_device * device);
 typedef int (*acpi_op_unbind) (struct acpi_device * device);
 typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
+typedef int (*acpi_op_prepare_remove) (struct acpi_device *device);
 
 struct acpi_bus_ops {
 	u32 acpi_op_add:1;
@@ -107,6 +108,7 @@ struct acpi_device_ops {
 	acpi_op_bind bind;
 	acpi_op_unbind unbind;
 	acpi_op_notify notify;
+	acpi_op_prepare_remove prepare_remove;
 };
 
 #define ACPI_DRIVER_ALL_NOTIFY_EVENTS	0x1	/* system AND device events */