diff --git a/lib/stringify.js b/lib/stringify.js
index b4c70a4..97f7b40 100644
--- a/lib/stringify.js
+++ b/lib/stringify.js
@@ -35,6 +35,7 @@ module.exports = function(file, data, options) {
   data = Object.assign({}, file.data, data);
   const open = opts.delimiters[0];
   const close = opts.delimiters[1];
+  const sep = opts.excerpt_separator || opts.delimiters[0];
   const matter = engine.stringify(data, options).trim();
   let buf = '';
 
@@ -44,7 +45,7 @@ module.exports = function(file, data, options) {
 
   if (typeof file.excerpt === 'string' && file.excerpt !== '') {
     if (str.indexOf(file.excerpt.trim()) === -1) {
-      buf += newline(file.excerpt) + newline(close);
+      buf += newline(file.excerpt) + newline(sep);
     }
   }