diff --git a/js/html_actuator.js b/js/html_actuator.js
index b6aec4015e50f9aae506b554edaf6a890baed67c..3e51195440a6eea9493526e98db005c8948b6c3f 100644
--- a/js/html_actuator.js
+++ b/js/html_actuator.js
@@ -118,9 +118,11 @@ HTMLActuator.prototype.updateBestScore = function (bestScore) {
 
 HTMLActuator.prototype.message = function (won) {
   var type    = won ? "game-won" : "game-over";
-  var message = won ? "You win!" : "Game over!"
+  var message = won ? "You win!" : "Game over!";
 
-  if (ga) ga("send", "event", "game", "end", type, this.score);
+  if (typeof ga !== "undefined") {
+    ga("send", "event", "game", "end", type, this.score);
+  }
 
   this.messageContainer.classList.add(type);
   this.messageContainer.getElementsByTagName("p")[0].textContent = message;