diff --git a/js/src/timer-driver.js b/js/src/timer-driver.js
index 4d8757b..2b87091 100644
--- a/js/src/timer-driver.js
+++ b/js/src/timer-driver.js
@@ -80,7 +80,10 @@ Alarm.prototype.checkTimeout = function () {
     this.cancelTimer();
   } else if (this.handle === null) {
     var self = this;
-    this.handle = setTimeout(Dataspace.wrap(function () { self.checkTimeout(); }), delta);
+    this.handle = setTimeout(Dataspace.wrap(function () {
+      self.handle = null;
+      self.checkTimeout();
+    }), delta);
   }
 };