diff --git a/ChangeLog b/ChangeLog
index 0b400b555e..f80a2468f6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Dec 24 17:50:35 2009  Yusuke Endoh  <mame@tsg.ne.jp>
+
+	* ext/stringio/stringio.c (strio_init): rewind when reopened.
+
 Thu Dec 24 17:06:13 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	* gc.c (run_final): runs finalizers with the object terminated.
diff --git a/ext/stringio/stringio.c b/ext/stringio/stringio.c
index 71b7b69f71..cd68185dc4 100644
--- a/ext/stringio/stringio.c
+++ b/ext/stringio/stringio.c
@@ -269,6 +269,8 @@ strio_init(argc, argv, ptr)
 	break;
     }
     ptr->string = string;
+    ptr->pos = 0;
+    ptr->lineno = 0;
 }
 
 static VALUE
diff --git a/test/stringio/test_stringio.rb b/test/stringio/test_stringio.rb
index de15ab5508..4c67d19c60 100644
--- a/test/stringio/test_stringio.rb
+++ b/test/stringio/test_stringio.rb
@@ -40,4 +40,17 @@ class TestStringIO < Test::Unit::TestCase
     end
     assert_equal("hacker\nother ruby\n", stringio.string)
   end
+  
+  def test_reopen
+    f = StringIO.new("foo\nbar\nbaz\n")
+    assert_equal("foo\n", f.gets)
+    f.reopen("qux\nquux\nquuux\n")
+    assert_equal("qux\n", f.gets)
+
+    f2 = StringIO.new("")
+    f2.reopen(f)
+    assert_equal("quux\n", f2.gets)
+  ensure
+    f.close unless f.closed?
+  end
 end
diff --git a/version.h b/version.h
index fce067b24b..656d9945c3 100644
--- a/version.h
+++ b/version.h
@@ -2,7 +2,7 @@
 #define RUBY_RELEASE_DATE "2009-12-24"
 #define RUBY_VERSION_CODE 187
 #define RUBY_RELEASE_CODE 20091224
-#define RUBY_PATCHLEVEL 245
+#define RUBY_PATCHLEVEL 246
 
 #define RUBY_VERSION_MAJOR 1
 #define RUBY_VERSION_MINOR 8