diff --git a/drivers/misc/thinkpad_acpi.h b/drivers/misc/thinkpad_acpi.h
index b7a4a88..88af089 100644
--- a/drivers/misc/thinkpad_acpi.h
+++ b/drivers/misc/thinkpad_acpi.h
@@ -193,7 +193,7 @@
 struct ibm_struct;
 
 struct tp_acpi_drv_struct {
-	char *hid;
+	const struct acpi_device_id *hid;
 	struct acpi_driver *driver;
 
 	void (*notify) (struct ibm_struct *, u32);