diff --git a/xdoc/src/plugin-resources/site.jsl b/xdoc/src/plugin-resources/site.jsl
index da4906c0..3241ad55 100644
--- a/xdoc/src/plugin-resources/site.jsl
+++ b/xdoc/src/plugin-resources/site.jsl
@@ -415,7 +415,7 @@
 
   <jsl:template match="source" trim="false">
     <div id="source">
-      <pre><x:expr select="."/></pre>
+      <pre><x:copyOf select="."/></pre>
     </div>
   </jsl:template>