diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c
index 6f5e395..c562224 100644
--- a/drivers/acpi/acpi_memhotplug.c
+++ b/drivers/acpi/acpi_memhotplug.c
@@ -81,6 +81,7 @@
 
 struct acpi_memory_device {
 	acpi_handle handle;
+	struct acpi_device * device;
 	unsigned int state;	/* State of the memory device */
 	struct list_head res_list;
 };
@@ -399,6 +400,7 @@
 
 	INIT_LIST_HEAD(&mem_device->res_list);
 	mem_device->handle = device->handle;
+	mem_device->device = device;
 	sprintf(acpi_device_name(device), "%s", ACPI_MEMORY_DEVICE_NAME);
 	sprintf(acpi_device_class(device), "%s", ACPI_MEMORY_DEVICE_CLASS);
 	acpi_driver_data(device) = mem_device;