diff --git a/lib/index.js b/lib/index.js
index eb3e98b..71d1e4c 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -99,6 +99,15 @@ function Reissue(opts) {
      * @type {Function}
      */
     self._nextHandlerId = null;
+
+    /**
+     * boolean flag set when we are waiting for user supplied function to
+     * complete. technically we should know this if self._nextHandlerId had
+     * a flag to show whether or not it had already been executed, but this is
+     * a safer way to do it.
+     * @type {Boolean}
+     */
+    self._inUserFunc = false;
 }
 util.inherits(Reissue, events.EventEmitter);
 
@@ -220,7 +229,7 @@ Reissue.prototype.start = function start(delay) {
     self._active = true;
 
     if (typeof delay === 'number') {
-        setTimeout(function _nextInvocation() {
+        self._nextHandlerId = setTimeout(function _nextInvocation() {
             self._execute();
         }, delay);
     } else {