diff --git a/xen/drivers/passthrough/pci.c b/xen/drivers/passthrough/pci.c
index e42fee009c..119337af5d 100644
--- a/xen/drivers/passthrough/pci.c
+++ b/xen/drivers/passthrough/pci.c
@@ -351,6 +351,7 @@ static struct pci_dev *alloc_pdev(struct pci_seg *pseg, u8 bus, u8 devfn)
         unsigned long flags;
 
         case DEV_TYPE_PCIe2PCI_BRIDGE:
+        case DEV_TYPE_PCI2PCIe_BRIDGE:
         case DEV_TYPE_LEGACY_PCI_BRIDGE:
             sec_bus = pci_conf_read8(pdev->sbdf, PCI_SECONDARY_BUS);
             sub_bus = pci_conf_read8(pdev->sbdf, PCI_SUBORDINATE_BUS);