diff --git a/tests/data/all_ethN.biosdevname b/tests/data/all_ethN.biosdevname
index 63bdc506..b1541ddc 100644
--- a/tests/data/all_ethN.biosdevname
+++ b/tests/data/all_ethN.biosdevname
@@ -66,3 +66,11 @@ VPD Port: 4
 VPD Index: 1
 VPD PCI master: 0000:07:00.1
 
+BIOS device: eth4
+Kernel name: eth4
+Permanent MAC: 40:54:00:12:34:56
+Assigned MAC : 40:54:00:12:34:56
+Driver: cdc_ether
+Driver version: 22-Aug-2005
+Firmware version: CDC Ethernet Device
+Bus Info: usb-0000:00:02.0-1
diff --git a/tests/data/physical.biosdevname b/tests/data/physical.biosdevname
index 3e0611d7..5392882e 100644
--- a/tests/data/physical.biosdevname
+++ b/tests/data/physical.biosdevname
@@ -66,3 +66,11 @@ VPD Port: 4
 VPD Index: 1
 VPD PCI master: 0000:07:00.1
 
+BIOS device: 
+Kernel name: eth4
+Permanent MAC: 40:54:00:12:34:56
+Assigned MAC : 40:54:00:12:34:56
+Driver: cdc_ether
+Driver version: 22-Aug-2005
+Firmware version: CDC Ethernet Device
+Bus Info: usb-0000:00:02.0-1
diff --git a/tests/test_biosdevname.py b/tests/test_biosdevname.py
index ea4bc127..fe1808bd 100644
--- a/tests/test_biosdevname.py
+++ b/tests/test_biosdevname.py
@@ -53,3 +53,7 @@ def test(self):
 
         self.assertEqual(devices['eth0']['BIOS device'],
                          {'all_ethN': 'eth0', 'physical': 'em1'})
+
+        self.assertEqual(devices['eth4']['BIOS device'],
+                         {'all_ethN': 'eth4', 'physical': ''})
+        self.assertEqual(devices['eth4']['Bus Info'], '0000:00:02.0')
diff --git a/xcp/net/biosdevname.py b/xcp/net/biosdevname.py
index ca00e20f..7099ca55 100644
--- a/xcp/net/biosdevname.py
+++ b/xcp/net/biosdevname.py
@@ -74,6 +74,10 @@ def all_devices_all_names():
                  "BIOS device" not in dinfo ):
                 continue
 
+            # Treat USB devices the PCI device of their host adapter
+            if dinfo.get("Bus Info", "").startswith("usb-"):
+                dinfo["Bus Info"] = dinfo["Bus Info"].split('-')[1]
+
             kname = dinfo["Kernel name"]
 
             if kname in devices: