diff --git a/ChangeLog b/ChangeLog
index fc40474f60..4cc23769d8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,16 @@
+Tue Dec  2 02:30:25 2014  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* lib/uri/generic.rb (URI::Generic.build):
+	  use hostname= to detect and wrap IPv6 hosts.
+	  Build is accepting URI components and users may not expect
+	  that a host component needs to be wrapped with square brackets
+	  since it's not providing a URI.
+	  Note: initialize with arg_check => true does not wrap IPv6 hosts.
+	  by Joe Rafaniello <jrafanie@redhat.com>
+	  https://github.com/ruby/ruby/pull/765 fix GH-765
+
+	* test/uri/test_generic.rb: Add more tests
+
 Mon Dec  1 20:01:12 2014  Masaki Suketa <masaki.suketa@nifty.ne.jp>
 
 	* ext/win32ole/win32ole.c: use typed data for WIN32OLE.
diff --git a/lib/uri/generic.rb b/lib/uri/generic.rb
index 730230c205..c0b94a84fe 100644
--- a/lib/uri/generic.rb
+++ b/lib/uri/generic.rb
@@ -184,7 +184,7 @@ module URI
       if arg_check
         self.scheme = scheme
         self.userinfo = userinfo
-        self.host = host
+        self.hostname = host
         self.port = port
         self.path = path
         self.query = query
diff --git a/test/uri/test_generic.rb b/test/uri/test_generic.rb
index 5767c2cc05..9de40a0276 100644
--- a/test/uri/test_generic.rb
+++ b/test/uri/test_generic.rb
@@ -758,12 +758,26 @@ class URI::TestGeneric < Test::Unit::TestCase
   end
 
   def test_build
-    URI::Generic.build(['http', nil, 'example.com', 80, nil, '/foo', nil, nil, nil])
+    u = URI::Generic.build(['http', nil, 'example.com', 80, nil, '/foo', nil, nil, nil])
+    assert_equal('http://example.com:80/foo', u.to_s)
+
+    u = URI::Generic.build(:scheme => "http", :host => "::1", :path => "/bar/baz")
+    assert_equal("http://[::1]/bar/baz", u.to_s)
+    assert_equal("[::1]", u.host)
+    assert_equal("::1", u.hostname)
+
+    u = URI::Generic.build(:scheme => "http", :host => "[::1]", :path => "/bar/baz")
+    assert_equal("http://[::1]/bar/baz", u.to_s)
+    assert_equal("[::1]", u.host)
+    assert_equal("::1", u.hostname)
   end
 
   def test_build2
-    URI::Generic.build2(path: "/foo bar/baz")
-    URI::Generic.build2(['http', nil, 'example.com', 80, nil, '/foo bar' , nil, nil, nil])
+    u = URI::Generic.build2(path: "/foo bar/baz")
+    assert_equal('/foo%20bar/baz', u.to_s)
+
+    u = URI::Generic.build2(['http', nil, 'example.com', 80, nil, '/foo bar' , nil, nil, nil])
+    assert_equal('http://example.com:80/foo%20bar', u.to_s)
   end
 
   # 192.0.2.0/24 is TEST-NET.  [RFC3330]