diff --git a/src/map.js b/src/map.js
index bf592a6d..d2750b26 100644
--- a/src/map.js
+++ b/src/map.js
@@ -631,11 +631,15 @@ jvm.Map.prototype = {
 
     if (jvm.$.isArray(keys)) {
       for (i = 0; i < keys.length; i++) {
-        this[type][keys[i]].element.setSelected(true);
+        if (this[type][keys[i]] != undefined) {
+          this[type][keys[i]].element.setSelected(true);
+        }
       }
     } else {
       for (i in keys) {
-        this[type][i].element.setSelected(!!keys[i]);
+        if (this[type][i] != undefined) {
+          this[type][i].element.setSelected(!!keys[i]);
+        }
       }
     }
   },
diff --git a/tests/unknown-region.html b/tests/unknown-region.html
new file mode 100644
index 00000000..627bfac3
--- /dev/null
+++ b/tests/unknown-region.html
@@ -0,0 +1,61 @@
+<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="utf-8"/>
+  <title>Maps</title>
+  <link rel="stylesheet" media="all" href="../jquery-jvectormap.css"/>
+
+  <script src="assets/jquery-1.8.2.js"></script>
+  <script src="../jquery-jvectormap.js"></script>
+  <script src="../lib/jquery-mousewheel.js"></script>
+
+  <script src="../src/jvectormap.js"></script>
+
+  <script src="../src/abstract-element.js"></script>
+  <script src="../src/abstract-canvas-element.js"></script>
+  <script src="../src/abstract-shape-element.js"></script>
+
+  <script src="../src/svg-element.js"></script>
+  <script src="../src/svg-group-element.js"></script>
+  <script src="../src/svg-canvas-element.js"></script>
+  <script src="../src/svg-shape-element.js"></script>
+  <script src="../src/svg-path-element.js"></script>
+  <script src="../src/svg-circle-element.js"></script>
+
+  <script src="../src/vml-element.js"></script>
+  <script src="../src/vml-group-element.js"></script>
+  <script src="../src/vml-canvas-element.js"></script>
+  <script src="../src/vml-shape-element.js"></script>
+  <script src="../src/vml-path-element.js"></script>
+  <script src="../src/vml-circle-element.js"></script>
+
+  <script src="../src/vector-canvas.js"></script>
+  <script src="../src/simple-scale.js"></script>
+  <script src="../src/ordinal-scale.js"></script>
+  <script src="../src/numeric-scale.js"></script>
+  <script src="../src/color-scale.js"></script>
+  <script src="../src/data-series.js"></script>
+  <script src="../src/proj.js"></script>
+  <script src="../src/map.js"></script>
+
+  <script src="assets/jquery-jvectormap-world-mill-en.js"></script>
+  <script>
+    $(function(){
+      var map = new jvm.Map({
+        container: $('.map'),
+        selectedRegions: ['US', 'CC', 'AU'],
+        map: 'world_mill_en'
+      });
+
+    });
+  </script>
+</head>
+<body>
+  <p>
+    Selected: United States (US), Cocos Islands (CC), Australia (AU)<br />
+    Non existent region: Cocos Islands (CC)
+  </p>
+
+  <div class="map" style="width: 800px; height: 500px"></div>
+</body>
+</html>
\ No newline at end of file
