diff --git a/js/map.js b/js/map.js
index ecba4f9..13874a5 100644
--- a/js/map.js
+++ b/js/map.js
@@ -112,6 +112,7 @@ function resetGame() {
     ko.innerText = 0
     correctAnswers.clear()
     clearInterval(intervalId)
+    intervalId = null
     gameTime = 0
     gamePenalty = 0
 }