diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 5a123774c2e67fcd22c6be52aeffd620a46b191f..468819cdde87c987fad9294e53dcc5652c508980 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -410,6 +410,8 @@ struct virtio_device_id {
  */
 struct hv_vmbus_device_id {
 	__u8 guid[16];
+	kernel_ulong_t driver_data	/* Data private to the driver */
+			__attribute__((aligned(sizeof(kernel_ulong_t))));
 };
 
 /* i2c */