diff --git a/lib/workers/dmpWorker.js b/lib/workers/dmpWorker.js
index 5b4b6aa..8e69636 100644
--- a/lib/workers/dmpWorker.js
+++ b/lib/workers/dmpWorker.js
@@ -57,7 +57,6 @@ process.on('message', function(data) {
 function createPatch(lastDoc, currDoc) {
     var ms_start = (new Date()).getTime();
     var diff = dmp.diff_main(lastDoc, currDoc);
-    dmp.diff_cleanupSemantic(diff);
     var patch = dmp.patch_make(lastDoc, diff);
     patch = dmp.patch_toText(patch);
     var ms_end = (new Date()).getTime();