diff --git a/src/logic.js b/src/logic.js
index ee9637f..6e6f181 100644
--- a/src/logic.js
+++ b/src/logic.js
@@ -102,8 +102,8 @@ const startingBoard = () => {
 }
 
 const textFromBoard = ({ state }) => {
-  const turn = (this.state.blackIsNext? 'B' : 'W');
-  return turn + this.state.squares.map(square => {
+  const turn = state?.blackIsNext ? 'B' : 'W';
+  return turn + state?.squares.map(square => {
     if (!square) {
       return '_';
     }