diff --git a/lib/aes.js b/lib/aes.js
index 356b986f..5c8e62fd 100644
--- a/lib/aes.js
+++ b/lib/aes.js
@@ -91,7 +91,7 @@ AesWorker.prototype.cleanUp = function () {
 AesWorker.prototype._createAes = function () {
     if (this._dir) {
         var salt = sjcl.random.randomWords(this._saltLen);
-        var derivedKey = sjcl.misc.pbkdf2(this._password, salt, 1000, (this._macLen + this._keyLen + passwordVerifierLen) * 8, sjcl.misc.hmac);
+        var derivedKey = sjcl.misc.pbkdf2(this._password, salt, 1000, (this._macLen + this._keyLen + passwordVerifierLen) * 8);
         this._aesKey = sjcl.bitArray.bitSlice(derivedKey, 0, this._keyLen * 8);
         var macKey = sjcl.bitArray.bitSlice(derivedKey, this._keyLen * 8, (this._keyLen + this._macLen) * 8);
         var derivedPassVerifier = sjcl.bitArray.bitSlice(derivedKey, (this._keyLen + this._macLen) * 8);
@@ -127,7 +127,7 @@ exports.verifyPassword  = function (data, options) {
     var saltLen = keyLen / 2;
 
     var salt = sjcl.codec.bytes.toBits(data.subarray(0, saltLen));
-    var derivedKey = sjcl.misc.pbkdf2(password, salt, 1000, (macLen + keyLen + passwordVerifierLen) * 8, sjcl.misc.hmac);
+    var derivedKey = sjcl.misc.pbkdf2(password, salt, 1000, (macLen + keyLen + passwordVerifierLen) * 8);
     var derivedPassVerifier = sjcl.bitArray.bitSlice(derivedKey, (keyLen + macLen) * 8);
     var passVerifyValue = sjcl.codec.bytes.toBits(data.subarray(saltLen, saltLen + passwordVerifierLen));
     if (!sjcl.bitArray.equal(passVerifyValue, derivedPassVerifier)) {
diff --git a/lib/compressedObject.js b/lib/compressedObject.js
index acd23e7f..d2cd0b0a 100644
--- a/lib/compressedObject.js
+++ b/lib/compressedObject.js
@@ -81,7 +81,6 @@ CompressedObject.prototype = {
 CompressedObject.createWorkerFrom = function (uncompressedWorker, compression, compressionOptions, encryptOptions) {
     if (encryptOptions.password !== null) {
         return uncompressedWorker
-        .pipe(new Crc32Probe())
         .pipe(new DataLengthProbe("uncompressedSize"))
         .pipe(compression.compressWorker(compressionOptions))
         .pipe(aes.EncryptWorker(encryptOptions))
diff --git a/lib/load.js b/lib/load.js
index 2974086a..28da5566 100644
--- a/lib/load.js
+++ b/lib/load.js
@@ -14,6 +14,10 @@ var nodejsUtils = require("./nodejsUtils");
  */
 function checkEntryCRC32(zipEntry) {
     return new external.Promise(function (resolve, reject) {
+        if (zipEntry.options.aes.version === 2) {
+            reject(new Error("Encrypted zip : no CRC32 stored"));
+            return;
+        }
         var worker = zipEntry.decompressed.getContentWorker().pipe(new Crc32Probe());
         worker.on("error", function (e) {
             reject(e);