diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c
index 0cd606ce222a..d5d0fa538f12 100644
--- a/drivers/block/cciss.c
+++ b/drivers/block/cciss.c
@@ -638,6 +638,7 @@ static int cciss_ioctl(struct inode *inode, struct file *filep,
 		cciss_pci_info_struct pciinfo;
 
 		if (!arg) return -EINVAL;
+		pciinfo.domain = pci_domain_nr(host->pdev->bus);
 		pciinfo.bus = host->pdev->bus->number;
 		pciinfo.dev_fn = host->pdev->devfn;
 		pciinfo.board_id = host->board_id;
diff --git a/include/linux/cciss_ioctl.h b/include/linux/cciss_ioctl.h
index ee0c6e8995da..424d5e622b43 100644
--- a/include/linux/cciss_ioctl.h
+++ b/include/linux/cciss_ioctl.h
@@ -10,6 +10,7 @@
 typedef struct _cciss_pci_info_struct
 {
 	unsigned char 	bus;
+	unsigned short	domain;
 	unsigned char 	dev_fn;
 	__u32 		board_id;
 } cciss_pci_info_struct;