diff --git a/vars/default_vars.yml b/vars/default_vars.yml
index f7cfa19a8..4fa2586aa 100644
--- a/vars/default_vars.yml
+++ b/vars/default_vars.yml
@@ -84,8 +84,12 @@ iiab_home_url: /home
 # You might also want to set captiveportal_splash_page (below!)
 
 # Internal Wi-Fi Access Point
-# Values are used if there is an internal Wi-Fi adapter and hostapd is enabled
-# The platform variable adapts install to specific hardware (raspberry pi=rpi2)
+# Values are used if there is an internal Wi-Fi adapter and hostapd is enabled.
+#
+# WARNING: If you connect your IIAB's internal WiFi to the Internet over 5 GHz,
+# you'll end up preventing older laptops/phones/tablets (which require 2.4 GHz)
+# from connecting to your IIAB's internal hotspot!  BAD IDEA (:
+#
 # Raspbian req WiFi country since March 2018.  CHANGE IT IN /etc/iiab/local_vars.yml
 host_country_code: US
 host_ssid: "Internet in a Box"