diff --git a/drivers/net/wireless/iwlwifi/iwl-trans.h b/drivers/net/wireless/iwlwifi/iwl-trans.h
index 593102d8..0359d71 100644
--- a/drivers/net/wireless/iwlwifi/iwl-trans.h
+++ b/drivers/net/wireless/iwlwifi/iwl-trans.h
@@ -234,6 +234,8 @@
  * @reg_lock - protect hw register access
  * @dev - pointer to struct device * that represents the device
  * @irq - the irq number for the device
+ * @hw_id: a u32 with the ID of the device / subdevice.
+  *	Set during transport alloaction.
  * @hw_id_str: a string with info about HW ID. Set during transport allocation.
  * @ucode_write_complete: indicates that the ucode has been copied.
  * @ucode_rt: run time ucode image
@@ -251,6 +253,7 @@
 
 	struct device *dev;
 	unsigned int irq;
+	u32 hw_id;
 	char hw_id_str[52];
 
 	u8 ucode_write_complete;	/* the image write is complete */