diff --git a/adev/src/content/guide/templates/binding.md b/adev/src/content/guide/templates/binding.md
index d438b1aab47..cd7eb304b4e 100644
--- a/adev/src/content/guide/templates/binding.md
+++ b/adev/src/content/guide/templates/binding.md
@@ -151,7 +151,7 @@ You can also bind directly to the `class` property. Angular accepts three types
 export class UserProfile {
   listClasses = 'full-width outlined';
   sectionClasses = signal(['expandable', 'elevated']);
-  buttonClasses = ({
+  buttonClasses = signal({
     highlighted: true,
     embiggened: false,
   });