diff --git a/lib/ical/recur_iterator.js b/lib/ical/recur_iterator.js
index 518a1a5e..3cecbb19 100644
--- a/lib/ical/recur_iterator.js
+++ b/lib/ical/recur_iterator.js
@@ -1385,6 +1385,13 @@ class RecurIterator {
   }
 }
 
+/**
+ * An error indicating that a recurrence rule is invalid and produces no
+ * occurrences.
+ *
+ * @extends {Error}
+ * @class
+ */
 class InvalidRecurrenceRuleError extends Error {
   constructor() {
     super("Recurrence rule has no valid occurrences");
diff --git a/test/recur_iterator_test.js b/test/recur_iterator_test.js
index a870d0fd..34ada1af 100644
--- a/test/recur_iterator_test.js
+++ b/test/recur_iterator_test.js
@@ -155,6 +155,7 @@ suite('recur_iterator', function() {
 
       if (options.noInstance) {
         assert.equal(iterator.next(), null);
+        assert.ok(iterator.completed);
         return;
       }