diff --git a/lib/imap.parsers.js b/lib/imap.parsers.js
index 5b2ccb8..fb80eb7 100644
--- a/lib/imap.parsers.js
+++ b/lib/imap.parsers.js
@@ -179,9 +179,7 @@ exports.parseBodyStructure = function(cur, literals, prefix, partID) {
 
         // body
         if (partLen > next && Array.isArray(cur[next])) {
-          part.body = exports.parseBodyStructure(cur[next], literals, prefix
-                                                    + (prefix !== '' ? '.' : '')
-                                                    + (partID++).toString(), 1);
+          part.body = exports.parseBodyStructure(cur[next], literals, prefix, 1);
         } else
           part.body = null;
         ++next;