diff --git a/nixos/modules/system/boot/systemd.nix b/nixos/modules/system/boot/systemd.nix
index a66176aff45f..c22264b3e92d 100644
--- a/nixos/modules/system/boot/systemd.nix
+++ b/nixos/modules/system/boot/systemd.nix
@@ -892,11 +892,15 @@ in
           let
             type = service.serviceConfig.Type or "";
             restart = service.serviceConfig.Restart or "no";
+            hasDeprecated = builtins.hasAttr "StartLimitInterval" service.serviceConfig;
           in
             concatLists [
               (optional (type == "oneshot" && (restart == "always" || restart == "on-success"))
                 "Service '${name}.service' with 'Type=oneshot' cannot have 'Restart=always' or 'Restart=on-success'"
               )
+              (optional hasDeprecated
+                "Service '${name}.service' uses the attribute 'StartLimitInterval' in the Service section, which is deprecated. See https://github.com/NixOS/nixpkgs/issues/45786."
+              )
             ]
         )
         cfg.services