diff --git a/ChangeLog b/ChangeLog
index 99c47893e0..f0975cb122 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Wed Feb 27 12:53:00 2013  Zachary Scott  <zachary@zacharyscott.net>
+
+	* thread.c (rb_thread_group): rdoc formatting
+
 Wed Feb 27 12:33:00 2013  Zachary Scott  <zachary@zacharyscott.net>
 
 	* lib/ostruct.rb: Typo in OpenStruct overview [Github Fixes #251]
diff --git a/thread.c b/thread.c
index 6605043e05..ff0df2be58 100644
--- a/thread.c
+++ b/thread.c
@@ -2453,8 +2453,8 @@ rb_thread_abort_exc_set(VALUE thread, VALUE val)
  *  call-seq:
  *     thr.group   -> thgrp or nil
  *
- *  Returns the <code>ThreadGroup</code> which contains <i>thr</i>, or nil if
- *  the thread is not a member of any group.
+ *  Returns the ThreadGroup which contains the given thread, or returns +nil+
+ *  if +thr+ is not a member of any group.
  *
  *     Thread.main.group   #=> #<ThreadGroup:0x4029d914>
  */