diff --git a/dom0/aux-tools/unbind_all_network_devices b/dom0/aux-tools/unbind_all_network_devices
index 4d6a4a44..1c86731d 100755
--- a/dom0/aux-tools/unbind_all_network_devices
+++ b/dom0/aux-tools/unbind_all_network_devices
@@ -35,7 +35,7 @@ def find_net_devices():
         raise IOError
 
     net_devices = set()
-    rx_netdev = re.compile (r"^([0-9][0-9]:[0-9][0-9].[0-9]) \"02")
+    rx_netdev = re.compile (r"^([0-9a-f][0-9a-f]:[0-9a-f][0-9a-f].[0-9]) \"02")
     for dev in str(result[0]).splitlines():
         match = rx_netdev.match (dev)
         if match is not None: