diff --git a/mail-server/users.nix b/mail-server/users.nix
index 0b168c1..916ec0c 100644
--- a/mail-server/users.nix
+++ b/mail-server/users.nix
@@ -21,7 +21,7 @@ with config.mailserver;
 let
   vmail_user = {
     name = vmailUserName;
-    isNormalUser = false;
+    isSystemUser = true;
     uid = vmailUID;
     home = mailDirectory;
     createHome = true;