diff --git a/lib/marked.js b/lib/marked.js
index daf8ce875c..92193d2cb6 100644
--- a/lib/marked.js
+++ b/lib/marked.js
@@ -751,6 +751,7 @@
         if (cap[3]) cap[3] = cap[3].substring(1, cap[3].length - 1);
         var tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
         return {
+          type: 'def',
           tag: tag,
           raw: cap[0],
           href: cap[2],