diff --git a/lib/OpenLayers/Control/OverviewMap.js b/lib/OpenLayers/Control/OverviewMap.js
index 0097ae87a7..19d3f5740a 100644
--- a/lib/OpenLayers/Control/OverviewMap.js
+++ b/lib/OpenLayers/Control/OverviewMap.js
@@ -147,8 +147,7 @@ OpenLayers.Control.OverviewMap.prototype =
 
         // Optionally add min/max buttons if the control will go in the
         // map viewport.
-        if(!this.div.parentNode  ||
-           (this.div.parentNode.className == 'olMapViewport')) {
+        if(!this.outsideViewport) {
             this.div.className = 'olControlOverviewMapContainer';
             var imgLocation = OpenLayers.Util.getImagesLocation();
             // maximize button div
diff --git a/lib/OpenLayers/Map.js b/lib/OpenLayers/Map.js
index 96d329a1f8..0399b51ea4 100644
--- a/lib/OpenLayers/Map.js
+++ b/lib/OpenLayers/Map.js
@@ -480,13 +480,13 @@ OpenLayers.Map.prototype = {
      * @param {OpenLayers.Pixel} px
      */    
     addControlToMap: function (control, px) {
+        // If a control doesn't have a div at this point, it belongs in the
+        // viewport.
+        control.outsideViewport = (control.div != null);
         control.setMap(this);
         var div = control.draw(px);
         if (div) {
-            // Only elements without parents should be appended to the viewport.
-            // In IE, even elements without parents are given a parent node
-            // of type 11 (DOCUMENT_FRAGMENT_NODE).
-            if(!div.parentNode || (div.parentNode.nodeType == 11)) {
+            if(!control.outsideViewport) {
                 div.style.zIndex = this.Z_INDEX_BASE['Control'] +
                                     this.controls.length;
                 this.viewPortDiv.appendChild( div );