diff --git a/NEWS b/NEWS
index cf17e42345..be51f55178 100644
--- a/NEWS
+++ b/NEWS
@@ -44,7 +44,6 @@ with all sufficient information, see the ChangeLog file or Redmine
 
   * IO#pread  [Feature #4532]
   * IO#pwrite  [Feature #4532]
-  * IO#reopen takes a block [Feature #2631]
 
 * IOError
 
diff --git a/io.c b/io.c
index 8b0064b2dc..3482602326 100644
--- a/io.c
+++ b/io.c
@@ -7058,10 +7058,6 @@ rb_io_reopen(int argc, VALUE *argv, VALUE file)
 	}
     }
 
-    if (rb_block_given_p()) {
-	return rb_ensure(rb_yield, file, io_close, file);
-    }
-
     return file;
 }
 
diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 186c148159..791e52b500 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -2156,22 +2156,6 @@ class TestIO < Test::Unit::TestCase
     }
   end
 
-  def test_reopen_with_block
-    make_tempfile {|t|
-      open(__FILE__) do |f|
-        f.gets
-        assert_nothing_raised {
-          reopened = nil
-          f.reopen(t.path) do |_reopened|
-            reopened = _reopened
-            assert_equal("foo\n", reopened.gets)
-          end
-          assert_equal(true, reopened.closed?)
-        }
-      end
-    }
-  end
-
   def test_reopen_inherit
     mkcdtmpdir {
       system(EnvUtil.rubybin, '-e', <<"End")