diff --git a/vars/default_vars.yml b/vars/default_vars.yml
index e2bb37e3c..f7cfa19a8 100644
--- a/vars/default_vars.yml
+++ b/vars/default_vars.yml
@@ -95,7 +95,10 @@ hostapd_secure: False
 hostapd_password: changeme
 hostapd_install: True    # 2020-01-21: this var MIGHT be implemented in future.
 hostapd_enabled: True
-wifi_up_down: True    # Creates a 2nd virtual wifi adapter for upstream WiFi
+wifi_hotspot_capacity_rpi_fix: True    # Restores the ability of RPi internal
+# WiFi hotspots to service 30-to-32 client devices.  Background explanation:
+# https://github.com/iiab/iiab/issues/823#issuecomment-662285202 and PR #2472.
+wifi_up_down: True    # Creates a 2nd virtual WiFi adapter for upstream WiFi
 # (e.g. to Internet) in addition to downstream WiFi (e.g. classroom hotspot).
 # You can set iiab_gateway_enabled below, to enable "passthrough" to Internet.