diff --git a/src/content/get-started/fundamentals/user-input.md b/src/content/get-started/fundamentals/user-input.md
index a9c49d5e9e6..4eec1fcaeaf 100644
--- a/src/content/get-started/fundamentals/user-input.md
+++ b/src/content/get-started/fundamentals/user-input.md
@@ -725,7 +725,7 @@ Widget build(BuildContext context) {
   return Switch(
     // This bool value toggles the switch.
     value: light,
-    activeColor: Colors.red,
+    activeThumbColor: Colors.red,
     onChanged: (bool value) {
       // This is called when the user toggles the switch.
       setState(() {