diff --git a/docs/windowsbrush-and-theme.md b/docs/windowsbrush-and-theme.md
index a78c6e1d0..1408ef410 100644
--- a/docs/windowsbrush-and-theme.md
+++ b/docs/windowsbrush-and-theme.md
@@ -55,11 +55,11 @@ class MyAppClass extends Component {
   };
 
   componentDidMount() {
-    Appearance.addChangeListener(this.onAppThemeChanged);
+    this._subscription = Appearance.addChangeListener(this.onAppThemeChanged);
   };
 
   componentWillUnmount() {
-    Appearance.addChangeListener(this.onAppThemeChanged);
+    this._subscription?.remove();
   };
 
   onAppThemeChanged = (theme) => {