diff --git a/lib/carto/tree/definition.js b/lib/carto/tree/definition.js
index 3a443ab..56f7fb2 100644
--- a/lib/carto/tree/definition.js
+++ b/lib/carto/tree/definition.js
@@ -118,7 +118,7 @@ tree.Definition.prototype.symbolizersToXML = function(env, symbolizers, zoom) {
         if (selfclosing) {
             xml += '/>\n';
         } else {
-            xml += '>' + tagcontent + '</' + name + '>\n';
+            xml += '><![CDATA[' + tagcontent + ']]></' + name + '>\n';
         }
     }
     xml += '  </Rule>\n';