diff --git a/lib/imap.parsers.js b/lib/imap.parsers.js
index 695e876..c86d764 100644
--- a/lib/imap.parsers.js
+++ b/lib/imap.parsers.js
@@ -65,7 +65,7 @@ exports.parseFetch = function(str, literals, fetchData) {
 };
 
 exports.parseBodyStructure = function(cur, literals, prefix, partID) {
-  var ret = [];
+  var ret = [], i, len;
   if (prefix === undefined) {
     var result = (Array.isArray(cur) ? cur : exports.parseExpr(cur, literals));
     if (result.length)
@@ -83,7 +83,7 @@ exports.parseBodyStructure = function(cur, literals, prefix, partID) {
       if (partLen > next) {
         if (Array.isArray(cur[next])) {
           part.params = {};
-          for (var i=0,len=cur[next].length; i<len; i+=2)
+          for (i=0,len=cur[next].length; i<len; i+=2)
             part.params[cur[next][i].toLowerCase()] = cur[next][i+1];
         } else
           part.params = cur[next];
@@ -111,7 +111,7 @@ exports.parseBodyStructure = function(cur, literals, prefix, partID) {
       }
       if (Array.isArray(cur[2])) {
         part.params = {};
-        for (var i=0,len=cur[2].length; i<len; i+=2)
+        for (i=0,len=cur[2].length; i<len; i+=2)
           part.params[cur[2][i].toLowerCase()] = cur[2][i+1];
         if (cur[1] === null)
           ++next;
@@ -120,7 +120,7 @@ exports.parseBodyStructure = function(cur, literals, prefix, partID) {
         // envelope
         if (partLen > next && Array.isArray(cur[next])) {
           part.envelope = {};
-          for (var i=0,len=cur[next].length; i<len; ++i) {
+          for (i=0,len=cur[next].length; i<len; ++i) {
             if (i === 0)
               part.envelope.date = cur[next][i];
             else if (i === 1)