diff --git a/content/ember/v3/property-function-prototype-extension.md b/content/ember/v3/property-function-prototype-extension.md
index 4f00e078dfb..99f25f36bd1 100644
--- a/content/ember/v3/property-function-prototype-extension.md
+++ b/content/ember/v3/property-function-prototype-extension.md
@@ -30,7 +30,7 @@ let Person = EmberObject.extend({
 
   fullName: function() {
     return `${this.firstName} ${this.lastName}`;
-  }.computed('firstName', 'lastName')
+  }.property('firstName', 'lastName')
 });
 
 let client = Person.create();