diff --git a/CHANGELOG.md b/CHANGELOG.md
index 569f32036f1..8a5f2f7a59b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # [`master`](https://github.com/elastic/eui/tree/master)
 
-No public interface changes since `0.0.40`.
+- add disabled prop to `EuiComboBoxOption` ([#650](https://github.com/elastic/eui/pull/650))
 
 # [`0.0.40`](https://github.com/elastic/eui/tree/v0.0.40)
 
diff --git a/src/components/combo_box/combo_box_options_list/combo_box_option.js b/src/components/combo_box/combo_box_options_list/combo_box_option.js
index e09d7219e1f..184712686a9 100644
--- a/src/components/combo_box/combo_box_options_list/combo_box_option.js
+++ b/src/components/combo_box/combo_box_options_list/combo_box_option.js
@@ -14,6 +14,7 @@ export class EuiComboBoxOption extends Component {
     optionRef: PropTypes.func,
     onClick: PropTypes.func.isRequired,
     onEnterKey: PropTypes.func.isRequired,
+    disabled: PropTypes.bool,
   }
 
   onClick = () => {