diff --git a/shtclck.js b/shtclck.js
index 8249144..4c78d68 100644
--- a/shtclck.js
+++ b/shtclck.js
@@ -8,6 +8,7 @@ let player2 = 'Player 2';
 let activePlayer = 1;
 let breakedPlayer = 1;
 let element;
+let audioCtx;
 
 document.body.oncontextmenu = function () {
     return false;