diff --git a/packages/router/src/lib/routes.spec.ts b/packages/router/src/lib/routes.spec.ts
index b196b193a..187a57b8e 100644
--- a/packages/router/src/lib/routes.spec.ts
+++ b/packages/router/src/lib/routes.spec.ts
@@ -1,5 +1,6 @@
 import { Route } from '@angular/router';
 import { of } from 'rxjs';
+import { expect, vi } from 'vitest';
 import { RouteExport, RouteMeta } from './models';
 import { createRoutes, Files } from './routes';
 import { ROUTE_META_TAGS_KEY } from './meta-tags';
@@ -605,4 +606,24 @@ describe('routes', () => {
       expect(routes[1].path).toBe('static');
     });
   });
+
+  describe('a route without default export', () => {
+    it('should throw error when default export is falsy', async () => {
+      const fileName = '/app/routes/index.ts';
+      const files: Files = {
+        [fileName]: () => Promise.resolve({} as unknown as RouteExport),
+      };
+
+      const routes = createRoutes(files);
+      const route = routes[0];
+
+      const spy = vi.spyOn(console, 'warn');
+
+      await route.loadChildren?.();
+
+      expect(spy).toHaveBeenCalledWith(
+        `[Analog] Missing default export at ${fileName}`
+      );
+    });
+  });
 });
diff --git a/packages/router/src/lib/routes.ts b/packages/router/src/lib/routes.ts
index 3c60bd85c..b110475d0 100644
--- a/packages/router/src/lib/routes.ts
+++ b/packages/router/src/lib/routes.ts
@@ -182,15 +182,27 @@ function toRoutes(rawRoutes: RawRoute[], files: Files): Route[] {
       ? {
           path: rawRoute.segment,
           loadChildren: () =>
-            module!().then((m) => [
-              {
-                path: '',
-                component: m.default,
-                ...toRouteConfig(m.routeMeta as RouteMeta | undefined),
-                children,
-                [ANALOG_META_KEY]: analogMeta,
-              },
-            ]),
+            module!().then((m) => {
+              if (!import.meta.env.PROD) {
+                const hasModuleDefault = !!m.default;
+
+                if (!hasModuleDefault) {
+                  console.warn(
+                    `[Analog] Missing default export at ${rawRoute.filename}`
+                  );
+                }
+              }
+
+              return [
+                {
+                  path: '',
+                  component: m.default,
+                  ...toRouteConfig(m.routeMeta as RouteMeta | undefined),
+                  children,
+                  [ANALOG_META_KEY]: analogMeta,
+                },
+              ];
+            }),
         }
       : { path: rawRoute.segment, children };