diff --git a/README.md b/README.md
index 5aee862..b3e67eb 100644
--- a/README.md
+++ b/README.md
@@ -170,7 +170,7 @@ adapters can be used together in order to compose complex functionality on top o
 There are currently 2 adapters available:
 
 * `FileSystem.adapters.Compression(provider)` - a compression adapter that uses [Zlib](https://github.com/imaya/zlib.js)
-* `FileSystem.adapters.Encryption(passphrase, provider)` - an encryption adapter that uses [AES encryption](http://code.google.com/p/crypto-js/#AES)
+* `FileSystem.adapters.Encryption(provider, passphrase)` - an encryption adapter that uses [AES encryption](http://code.google.com/p/crypto-js/#AES)
 
 ```javascript
 var FileSystem = Filer.FileSystem;
@@ -180,7 +180,7 @@ var adapters = FileSystem.adapters;
 // Create a WebSQL-based, Encrypted, Compressed File System by
 // composing a provider and adatpers.
 var webSQLProvider = new providers.WebSQL();
-var encryptionAdatper = new adapters.Encryption('super-secret-passphrase', webSQLProvider);
+var encryptionAdatper = new adapters.Encryption(webSQLProvider, 'super-secret-passphrase');
 var compressionAdatper = new adatpers.Compression(encryptionAdapter);
 var fs = new FileSystem({ provider: compressionAdapter });
 ```
diff --git a/src/adapters/crypto.js b/src/adapters/crypto.js
index f0bd3f6..f8f1bd3 100644
--- a/src/adapters/crypto.js
+++ b/src/adapters/crypto.js
@@ -70,7 +70,7 @@ define(function(require) {
 
   // It is up to the app using this wrapper how the passphrase is acquired, probably by
   // prompting the user to enter it when the file system is being opened.
-  function CryptoAdapter(passphrase, provider) {
+  function CryptoAdapter(provider, passphrase) {
     this.provider = provider;
 
     // Cache cipher algorithm we'll use in encrypt/decrypt
diff --git a/tests/spec/adapters/adapters.general.spec.js b/tests/spec/adapters/adapters.general.spec.js
index 068457f..8f23a1c 100644
--- a/tests/spec/adapters/adapters.general.spec.js
+++ b/tests/spec/adapters/adapters.general.spec.js
@@ -156,7 +156,7 @@ define(["Filer", "util"], function(Filer, util) {
   // Encryption
   buildTestsFor('Encryption', function buildAdapter(provider) {
     var passphrase = '' + Date.now();
-    return new Filer.FileSystem.adapters.Encryption(passphrase, provider);
+    return new Filer.FileSystem.adapters.Encryption(provider, passphrase);
   });
 
   // Compression
@@ -168,7 +168,7 @@ define(["Filer", "util"], function(Filer, util) {
   buildTestsFor('Encryption+Compression', function buildAdapter(provider) {
     var passphrase = '' + Date.now();
     var compression = new Filer.FileSystem.adapters.Compression(provider);
-    var encryptionWithCompression = new Filer.FileSystem.adapters.Encryption(passphrase, compression);
+    var encryptionWithCompression = new Filer.FileSystem.adapters.Encryption(compression, passphrase);
     return encryptionWithCompression;
   });