diff --git a/roles/network/tasks/computed_network.yml b/roles/network/tasks/computed_network.yml
index 0fa9505a9..9a466533a 100644
--- a/roles/network/tasks/computed_network.yml
+++ b/roles/network/tasks/computed_network.yml
@@ -111,7 +111,10 @@
 # stick around but testing gateway response is not performed.
 - name: User wants single wired interface as static or dhcp gateway
   set_fact:
-    user_wan_iface: "{{ discovered_wan_iface }}"   # Jan 2018: discovered_lan_iface was UNDEFINED on WiFi-installed RPi
+    user_wan_iface: "{{ discovered_wan_iface }}"   # Jan 2018: Holt discovered_lan_iface was UNDEFINED on WiFi-installed
+                                                   # RPi (when re-running ./iiab-network) so "discovered_wan_iface" is a
+                                                   # workaround -- please see https://github.com/iiab/iiab/pull/649
+                                                   # This workaround can and should evolve as IIAB 6.5 matures!
   when: num_lan_interfaces == "1" and user_lan_iface == "auto" and user_wan_iface == "auto"
 
 - name: No LAN configured - 'Appliance' mode