diff --git a/module.nix b/module.nix
index 3de0c6c..55c9930 100644
--- a/module.nix
+++ b/module.nix
@@ -96,7 +96,7 @@ in
       serviceConfig = {
         Type = "simple";
         LoadCredential = lib.optionalString (cfg.secretFile != null) "secrets.yaml:${cfg.secretFile}";
-        ExecStart = "${lib.getExe pkgs.mail-quota-warning}${lib.optionalString (cfg.secretFile != null) " --config \${CREDENTIALS_DIRECTORY}/secrets.yaml";
+        ExecStart = "${lib.getExe pkgs.mail-quota-warning} --config \${CREDENTIALS_DIRECTORY}/secrets.yaml";
         WorkingDirectory = "%S/mail-quota-warning";
         StateDirectory = "mail-quota-warning";