diff --git a/mail-server/dovecot.nix b/mail-server/dovecot.nix
index 94682fa..2f83a86 100644
--- a/mail-server/dovecot.nix
+++ b/mail-server/dovecot.nix
@@ -450,7 +450,7 @@ in
         # default user mailboxes
         "namespace inbox" = {
           inbox = true;
-          separator = ".";
+          separator = cfg.hierarchySeparator;
         }
         // mapAttrs' (name: value: nameValuePair ''mailbox "${name}"'' value) cfg.mailboxes;
         lda_mailbox_autosubscribe = true;