diff --git a/lib/OpenLayers/Renderer/VML.js b/lib/OpenLayers/Renderer/VML.js
index 43ae737397..4176fadd2c 100644
--- a/lib/OpenLayers/Renderer/VML.js
+++ b/lib/OpenLayers/Renderer/VML.js
@@ -410,6 +410,9 @@ OpenLayers.Renderer.VML = OpenLayers.Class(OpenLayers.Renderer.Elements, {
      * radius - {float}
      */
     drawCircle: function(node, geometry, radius) {
+        if (typeof radius == "undefined") {
+            radius = 0;
+        }
         if(!isNaN(geometry.x)&& !isNaN(geometry.y)) {
             var resolution = this.getResolution();