diff --git a/lib/keyParser.js b/lib/keyParser.js
index cca5cb39..a228697b 100644
--- a/lib/keyParser.js
+++ b/lib/keyParser.js
@@ -1219,6 +1219,7 @@ function parseDER(data, baseType, comment, fullType) {
     utils = require('./utils');
 
   var algo;
+  var oid;
   var pubPEM = null;
   var pubSSH = null;
   switch (baseType) {