diff --git a/common/discover.c b/common/discover.c
index 26a78ca..ed01e45 100644
--- a/common/discover.c
+++ b/common/discover.c
@@ -635,6 +635,8 @@ discover_interfaces(int state) {
 			interface_dereference(&tmp, MDL);
 			tmp = interfaces; /* XXX */
 		}
+		if (tmp != NULL)
+			get_hw_addr(tmp);
 
 		if (dhcp_interface_discovery_hook) {
 			(*dhcp_interface_discovery_hook)(tmp);