diff --git a/ChangeLog b/ChangeLog
index 6161ac5bd3..119e5390c6 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Apr 29 11:17:08 2010  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* io.c (rb_io_s_binread): fixed rdoc.  parts of a patch from Roger
+	  Pack in [ruby-core:29861].
+
 Thu Apr 29 03:50:49 2010  James Edward Gray II  <jeg2@ruby-lang.org>
 
 	* lib/xmlrpc/utils.rb: Fixing an incompatibility with
diff --git a/io.c b/io.c
index b1ca613169..ca33af2804 100644
--- a/io.c
+++ b/io.c
@@ -7922,7 +7922,7 @@ seek_before_read(struct seek_arg *arg)
  *     IO.read(name, [length [, offset]] )   => string
  *     IO.read(name, [length [, offset]], open_args)   => string
  *
- *  Opens the file, optionally seeks to the given offset, then returns
+ *  Opens the file, optionally seeks to the given <i>offset</i>, then returns
  *  <i>length</i> bytes (defaulting to the rest of the file).
  *  <code>read</code> ensures the file is closed before returning.
  *
@@ -7978,9 +7978,9 @@ rb_io_s_read(int argc, VALUE *argv, VALUE io)
  *  call-seq:
  *     IO.binread(name, [length [, offset]] )   => string
  *
- *  Opens the file, optionally seeks to the given offset, then returns
+ *  Opens the file, optionally seeks to the given <i>offset</i>, then returns
  *  <i>length</i> bytes (defaulting to the rest of the file).
- *  <code>read</code> ensures the file is closed before returning.
+ *  <code>binread</code> ensures the file is closed before returning.
  *  The open mode would be "rb:ASCII-8BIT".
  *
  *     IO.binread("testfile")           #=> "This is line one\nThis is line two\nThis is line three\nAnd so on...\n"