diff --git a/doc/main.conf b/doc/main.conf
index 0bb2f92d..9286c9ef 100644
--- a/doc/main.conf
+++ b/doc/main.conf
@@ -51,3 +51,14 @@ ControlPortOverNL80211=True
 #bss_blacklist_time=60
 #bss_blacklist_multiplier=30
 #bss_blacklist_max_time=86400
+
+[Rank]
+#
+# Manually specify a 5G ranking factor. 5G networks are already preferred but
+# only in terms of calculated data rate, which is RSSI dependent. This means it
+# is still possible for IWD to prefer a 2.4GHz AP in the right conditions.
+# This ranking provides a way to further weight the ranking towards 5G if
+# required. Also, a lower 5G factor could be used to weight 2.4GHz if that is
+# desired.
+#
+#rank_5g_factor=1.0