diff --git a/ChangeLog b/ChangeLog
index f8f109b083..5afcec1cca 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Fri Aug  9 15:56:05 2013  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* lib/net/http.rb (Net::HTTP#send_request_with_body_stream): use
+	  String#bytesize instead of String#length.
+	  reported by shekhei (shek hei wong) at [ruby-core:53775]
+	  [Backport #8176].
+
 Fri Aug  9 15:50:11 2013  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* win32/win32.c (wrename): use MoveFileExW instead of MoveFileW,
diff --git a/lib/net/http.rb b/lib/net/http.rb
index 9e4fe6a120..67de15cd27 100644
--- a/lib/net/http.rb
+++ b/lib/net/http.rb
@@ -1948,7 +1948,7 @@ module Net   #:nodoc:
       wait_for_continue sock, ver if sock.continue_timeout
       if chunked?
         while s = f.read(1024)
-          sock.write(sprintf("%x\r\n", s.length) << s << "\r\n")
+          sock.write(sprintf("%x\r\n", s.bytesize) << s << "\r\n")
         end
         sock.write "0\r\n\r\n"
       else
diff --git a/version.h b/version.h
index a735292053..5053facb33 100644
--- a/version.h
+++ b/version.h
@@ -1,5 +1,5 @@
 #define RUBY_VERSION "1.9.3"
-#define RUBY_PATCHLEVEL 461
+#define RUBY_PATCHLEVEL 462
 
 #define RUBY_RELEASE_DATE "2013-08-09"
 #define RUBY_RELEASE_YEAR 2013