diff --git a/src/final/01.extra-2.js b/src/final/01.extra-2.js
index 6a7b248b..961e1e2f 100644
--- a/src/final/01.extra-2.js
+++ b/src/final/01.extra-2.js
@@ -11,7 +11,7 @@ function Counter({initialCount = 0, step = 1}) {
     count: initialCount,
   })
   const {count} = state
-  const increment = () => setState({count: count + 1})
+  const increment = () => setState({count: count + step})
   return <button onClick={increment}>{count}</button>
 }
 
diff --git a/src/final/01.extra-3.js b/src/final/01.extra-3.js
index fea8c59c..9e1ce67e 100644
--- a/src/final/01.extra-3.js
+++ b/src/final/01.extra-3.js
@@ -15,7 +15,7 @@ function Counter({initialCount = 0, step = 1}) {
   })
   const {count} = state
   const increment = () =>
-    setState(currentState => ({count: currentState.count + 1}))
+    setState(currentState => ({count: currentState.count + step}))
   return <button onClick={increment}>{count}</button>
 }