diff --git a/nixos/modules/services/security/fail2ban.nix b/nixos/modules/services/security/fail2ban.nix
index 3758652ebddf..c40f41e07d4f 100644
--- a/nixos/modules/services/security/fail2ban.nix
+++ b/nixos/modules/services/security/fail2ban.nix
@@ -40,7 +40,7 @@ in
             socket    = /run/fail2ban/fail2ban.sock
             pidfile   = /run/fail2ban/fail2ban.pid
           '';
-        type = types.string;
+        type = types.lines;
         description =
           ''
             The contents of Fail2ban's main configuration file.  It's
@@ -64,7 +64,7 @@ in
                 maxretry = 5
               '';
           };
-        type = types.attrsOf types.string;
+        type = types.attrsOf types.lines;
         description =
           ''
             The configuration of each Fail2ban “jail”.  A jail