diff --git a/tutorial/tutorial.md b/tutorial/tutorial.md
index fd17c1d0..a2bc0bcb 100644
--- a/tutorial/tutorial.md
+++ b/tutorial/tutorial.md
@@ -392,7 +392,7 @@ handleClick(i) {
   if (calculateWinner(squares) || squares[i]) {
     return;
   }
-  squares[i] = this.state.xIsNext(current.squares) ? 'X' : 'O';
+  squares[i] = this.state.xIsNext ? 'X' : 'O';
   this.setState({
     history: history.concat([{
       squares: squares