diff --git a/README.md b/README.md
index 29052dc..7e06f05 100644
--- a/README.md
+++ b/README.md
@@ -68,11 +68,18 @@ API documentation is available [here](https://bitchan.github.io/bitmessage/docs/
 
 ## Usage
 
+### Address
+
 ```js
-// Generate a new random Bitmessage identity.
 var Address = require("bitmessage").Address;
-var addr = Address.fromRandom();
-console.log("New random Bitmessage address:", addr.encode());
+
+// Generate a new random Bitmessage identity.
+var addr1 = Address.fromRandom();
+console.log("New random Bitmessage address:", addr1.encode());
+
+// Or create it from passphrase.
+var addr2 = Address.fromPassphrase("test");
+console.log("Deterministic Bitmessage address:", addr2.encode());
 ```
 
 ## License
diff --git a/lib/address.js b/lib/address.js
index d280988..eed31ef 100644
--- a/lib/address.js
+++ b/lib/address.js
@@ -29,11 +29,12 @@ function Address(opts) {
   this.version = popkey(opts, "version") || 4;
   assert(this.version <= 4, "Version too high");
   assert(this.version >= 1, "Version too low");
+  // Set defaults.
+  opts.stream = opts.stream || 1;
+  opts.behavior = opts.behavior ||
+                  PubkeyBitfield().set(PubkeyBitfield.DOES_ACK);
   // Merge remained values.
   objectAssign(this, opts);
-  this.stream = this.stream || 1;
-  this.pubkeyFeatures = this.pubkeyFeatures ||
-                        PubkeyBitfield().set(PubkeyBitfield.DOES_ACK);
 }
 
 /**
@@ -210,7 +211,11 @@ Address.fromRandom = function(opts) {
  * @return {Address} Generated address object.
  */
 Address.fromPassphrase = function(opts) {
-  opts = objectAssign({}, opts);
+  if (typeof opts === "string") {
+    opts = {passphrase: opts};
+  } else {
+    opts = objectAssign({}, opts);
+  }
   var version = opts.version = opts.version || 4;
   var ripelen = popkey(opts, "ripelen") || 19;
   assertripelen(ripelen, version);
diff --git a/lib/structs.js b/lib/structs.js
index 7f281fc..6da3fc7 100644
--- a/lib/structs.js
+++ b/lib/structs.js
@@ -501,7 +501,7 @@ exports.encrypted = {
 var Bitfield = function(size) {
   var bytesize = size / 8;
 
-  // <https://github.com/fb55/bitfield> is the source of inspiration.
+  // Inspired by <https://github.com/fb55/bitfield>.
   function BitfieldInner(buf, opts) {
     if (!(this instanceof BitfieldInner)) {
       return new BitfieldInner(buf);
@@ -574,15 +574,15 @@ var ServicesBitfield = exports.ServicesBitfield = objectAssign(Bitfield(64), {
 // invert the numberes. See
 // <https://github.com/Bitmessage/PyBitmessage/issues/769> for details.
 exports.PubkeyBitfield = objectAssign(Bitfield(32), {
+  /**
+   * If true, the receiving node does send acknowledgements (rather than
+   * dropping them).
+   */
+  DOES_ACK: 0,
   /**
    * Receiving node expects that the RIPE hash encoded in their address
    * preceedes the encrypted message data of msg messages bound for
    * them.
    */
   INCLUDE_DESTINATION: 1,
-  /**
-   * If true, the receiving node does send acknowledgements (rather than
-   * dropping them).
-   */
-  DOES_ACK: 0,
 });
diff --git a/test.js b/test.js
index edbbaff..068b257 100644
--- a/test.js
+++ b/test.js
@@ -570,6 +570,17 @@ describe("High-level classes", function() {
       expect(addr.encode()).to.equal("BM-2cWFkyuXXFw6d393RGnin2RpSXj8wxtt6F");
     });
 
+    it("should accept string in Address.fromPassphrase", function() {
+      this.timeout(60000);
+      var addr = Address.fromPassphrase("test");
+      expect(addr.version).to.equal(4);
+      expect(addr.stream).to.equal(1);
+      expect(bufferEqual(addr.signPrivateKey, WIF.decode("5JY1CFeeyN4eyfL35guWAuUqu5VLmd7LojtkNP6wmt5msZxxZ57"))).to.be.true;
+      expect(bufferEqual(addr.encPrivateKey, WIF.decode("5J1oDgZDicNhUgbfzBDQqi2m5jUPnDrfZinnTqEEEaLv63jVFTM"))).to.be.true;
+      expect(addr.getRipe().toString("hex")).to.equal("00ac14944b00decea5628eb40d0ff4b0f9ee9eca");
+      expect(addr.encode()).to.equal("BM-2cWFkyuXXFw6d393RGnin2RpSXj8wxtt6F");
+    });
+
     it("should calculate tag", function() {
       var addr = Address.decode("2cTux3PGRqHTEH6wyUP2sWeT4LrsGgy63z");
       expect(addr.getTag().toString("hex")).to.equal("facf1e3e6c74916203b7f714ca100d4d60604f0917696d0f09330f82f52bed1a");