diff --git a/addons/docs/src/frameworks/ember/jsondoc.js b/addons/docs/src/frameworks/ember/jsondoc.js
index 307f8c35bc6..5072a942f92 100644
--- a/addons/docs/src/frameworks/ember/jsondoc.js
+++ b/addons/docs/src/frameworks/ember/jsondoc.js
@@ -14,7 +14,7 @@ export const extractArgTypes = (componentName) => {
   const rows = componentDoc.attributes.arguments.map((prop) => {
     return {
       name: prop.name,
-      defaultValue: prop.defaultValue,
+      defaultValue: { summary: prop.defaultValue },
       description: prop.description,
       table: {
         type: {
diff --git a/examples/ember-cli/app/components/welcome-banner.js b/examples/ember-cli/app/components/welcome-banner.js
index 5b4bb4e0bb1..05478b4b560 100644
--- a/examples/ember-cli/app/components/welcome-banner.js
+++ b/examples/ember-cli/app/components/welcome-banner.js
@@ -23,6 +23,7 @@ export default Component.extend({
    * The hex-formatted color code for the background.
    * @argument backgroundColor
    * @type {string}
+   * @default null
    */
   backgroundColor: null,