diff --git a/lib/markdown.js b/lib/markdown.js
index da5d29cc..e915e6ee 100644
--- a/lib/markdown.js
+++ b/lib/markdown.js
@@ -287,6 +287,11 @@ Markdown.dialects = {};
  **/
 Markdown.dialects.Gruber = {
   block: {
+    htmlBlock: function htmlBlock( block, next ) {
+      if ( block.match( /^\s*<\w/ ) && block.match( /<\/\s*\w+\s*>\s*$/ ) )
+        return [["__RAW", block.toString()]];
+    },
+
     atxHeader: function atxHeader( block, next ) {
       var m = block.match( /^(#{1,6})\s*(.*?)\s*#*\s*(?:\n|$)/ );
 
@@ -1293,6 +1298,9 @@ function render_tree( jsonml ) {
   if ( typeof jsonml === "string" ) {
     return escapeHTML( jsonml );
   }
+  if ( jsonml[0] == "__RAW" ) {
+    return jsonml[1];
+  }
 
   var tag = jsonml.shift(),
       attributes = {},