diff --git a/config/jail.conf b/config/jail.conf
index b2fb7ec0..ebd3f02c 100644
--- a/config/jail.conf
+++ b/config/jail.conf
@@ -97,7 +97,9 @@ before = paths-debian.conf
 # ignorecommand = /path/to/command <ip>
 ignorecommand =
 
-# "bantime" is the number of seconds that a host is banned.
+# "bantime" is the amount of time that a host is banned, integer in seconds or
+# time abbreviation format (m - minutes, h - hours, d - days, w - weeks, mo - months, y - years).
+# This is to consider as an initial time if bantime.increment gets enabled.
 bantime  = 10m
 
 # A host is banned if it has generated "maxretry" during the last "findtime"