diff --git a/lib/js/markerwithlabel.js b/lib/js/markerwithlabel.js
index c46df52..48c7ccb 100644
--- a/lib/js/markerwithlabel.js
+++ b/lib/js/markerwithlabel.js
@@ -306,11 +306,15 @@ MarkerLabel_.prototype.onAdd = function () {
  */
 MarkerLabel_.prototype.onRemove = function () {
   var i;
-  this.labelDiv_.parentNode.removeChild(this.labelDiv_);
+  if (this.labelDiv_.parentNode) {
+    this.labelDiv_.parentNode.removeChild(this.labelDiv_);
+  }
 
   // Remove event listeners:
-  for (i = 0; i < this.listeners_.length; i++) {
-    google.maps.event.removeListener(this.listeners_[i]);
+  if (this.listeners_) {
+    for (i = 0; i < this.listeners_.length; i++) {
+      google.maps.event.removeListener(this.listeners_[i]);
+    }
   }
 };