diff --git a/lib/processings/prefixize.js b/lib/processings/prefixize.js
index 94aede7..5d5744f 100644
--- a/lib/processings/prefixize.js
+++ b/lib/processings/prefixize.js
@@ -31,8 +31,25 @@ module.exports = function (doc, prefix) {
 
   $('*').each(function () {
     var $elem = $(this);
+    var isStyleTag = $elem[0].name === 'style';
     var attrs = $elem.attr();
 
+    if (isStyleTag) {
+      var content = $elem.text();
+      var id;
+      var match;
+
+      while ((match = urlPattern.exec(content)) !== null) {
+        id = match[1];
+        if (!!mappedIds[id]) {
+          mappedIds[id].referenced = true;
+          content = content.replace(match[0], 'url(#' + mappedIds[id].id + ')');
+        }
+      }
+
+      id && $elem.text(content);
+    }
+
     Object.keys(attrs).forEach(function (key) {
       var value = attrs[key];
       var id;
@@ -56,4 +73,4 @@ module.exports = function (doc, prefix) {
       }
     });
   });
-};
\ No newline at end of file
+};