diff --git a/lib/scrypt-for-humans.coffee b/lib/scrypt-for-humans.coffee
index 1289b2d..b8d201e 100644
--- a/lib/scrypt-for-humans.coffee
+++ b/lib/scrypt-for-humans.coffee
@@ -44,7 +44,7 @@ scryptHandler = (resolve, reject) ->
 	# Well, `scrypt` now returns real Error objects. Except now they don't have error codes anymore...
 	return (err, result) ->
 		if err?
-			errorObj = switch scryptErrorMap[err.message]
+			errorObj = switch (scryptErrorMap[err.message] ? -1)
 				when 1, 2, 3, 4, 5, 6, 9, 10, 12, 13, -1 then errors.ScryptInternalError
 				when 7, 8 then errors.ScryptInputError
 				when 11 then errors.ScryptPasswordError
diff --git a/lib/scrypt-for-humans.js b/lib/scrypt-for-humans.js
index 662a370..4bace34 100644
--- a/lib/scrypt-for-humans.js
+++ b/lib/scrypt-for-humans.js
@@ -65,7 +65,8 @@ scryptHandler = function(resolve, reject) {
     var errorObj;
     if (err != null) {
       errorObj = (function() {
-        switch (scryptErrorMap[err.message]) {
+        var _ref;
+        switch ((_ref = scryptErrorMap[err.message]) != null ? _ref : -1) {
           case 1:
           case 2:
           case 3:
diff --git a/package.json b/package.json
index 1c05bed..7938d55 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "scrypt-for-humans",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "description": "A human-friendly API wrapper for the Node.js Scrypt bindings.",
   "main": "index.js",
   "scripts": {