diff --git a/modules/nixos/services/systemd-email-notify/default.nix b/modules/nixos/services/systemd-email-notify/default.nix
index f3b58b1..0cdce43 100644
--- a/modules/nixos/services/systemd-email-notify/default.nix
+++ b/modules/nixos/services/systemd-email-notify/default.nix
@@ -77,7 +77,7 @@ in
       type =
         with types;
         attrsOf (submodule {
-          config.onFailure = onFailureUnits;
+          config.onFailure = mkIf cfg.enable onFailureUnits;
         });
     };
   };