diff --git a/xmlsitemap.xmlsitemap.inc b/xmlsitemap.xmlsitemap.inc
index 2520358..00f917a 100644
--- a/xmlsitemap.xmlsitemap.inc
+++ b/xmlsitemap.xmlsitemap.inc
@@ -65,7 +65,10 @@ class XMLSitemapWriter extends XMLWriter {
    * Add the XML stylesheet to the XML page.
    */
   public function writeXSL() {
-    $this->writePi('xml-stylesheet', 'type="text/xsl" href="' . url('sitemap.xsl', $this->sitemap->uri['options']) . '"');
+    $url = url('sitemap.xsl', $this->sitemap->uri['options']);
+    $url = preg_replace("(^https?://)", "", $url );
+    $url = '//' . $url;
+    $this->writePi('xml-stylesheet', 'type="text/xsl" href="' . $url . '"');
     $this->writeRaw(PHP_EOL);
   }