diff --git a/fail2ban/server/jails.py b/fail2ban/server/jails.py
index 7fe7a231..19552ea0 100644
--- a/fail2ban/server/jails.py
+++ b/fail2ban/server/jails.py
@@ -56,6 +56,8 @@ class Jails(Mapping):
 			The name of the jail.
 		backend : str
 			The backend to use.
+		db : Fail2BanDb
+			Fail2Ban's persistent database instance.
 
 		Raises
 		------