diff --git a/lib/file-visitor.js b/lib/file-visitor.js
index 4482d7c..b6b58f3 100644
--- a/lib/file-visitor.js
+++ b/lib/file-visitor.js
@@ -26,8 +26,13 @@ module.exports = function(less) {
             if (!this._inRule) {
                 return URLNode;
             }
+            if (URLNode.value && URLNode.value.value && URLNode.value.value.indexOf('#') === 0) {
+                // Might be part of a VML url-node value like:
+                // ``behavior:url(#default#VML);``
+                return URLNode;
+            }
             return new less.tree.Call('url', [new ParamStringReplacementNode(URLNode.value, options)], URLNode.index || 0, URLNode.currentFileInfo);
         }
     };
     return SrcReplacement;
-};
\ No newline at end of file
+};