diff --git a/nixos/modules/services/home-automation/home-assistant.nix b/nixos/modules/services/home-automation/home-assistant.nix
index f389b2d84dab..0a399e0774d1 100644
--- a/nixos/modules/services/home-automation/home-assistant.nix
+++ b/nixos/modules/services/home-automation/home-assistant.nix
@@ -75,7 +75,7 @@ let
   # Create parts of the lovelace config that reference lovelave modules as resources
   customLovelaceModulesResources = {
     lovelace.resources = map (card: {
-      url = "/local/nixos-lovelace-modules/${card.entrypoint or card.pname}.js?${card.version}";
+      url = "/local/nixos-lovelace-modules/${card.entrypoint or card.pname + ".js"}?${card.version}";
       type = "module";
     }) cfg.customLovelaceModules;
   };