diff --git a/ChangeLog b/ChangeLog
index fbf727fe06..4c8e2194fd 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Aug 15 02:32:40 2013  Zachary Scott  <e@zzak.io>
+
+	* hash.c (rb_hash_aset): [DOC] Document key dup patch by @kachick
+	  [Fixes GH-382] https://github.com/ruby/ruby/pull/382
+
 Wed Aug 14 14:28:39 2013  NAKAMURA Usaku  <usa@ruby-lang.org>
 
 	* proc.c (rb_mod_define_method): now they return the symbols of the
diff --git a/hash.c b/hash.c
index 91a4e9fea0..8de71db268 100644
--- a/hash.c
+++ b/hash.c
@@ -1261,17 +1261,24 @@ static NOINSERT_UPDATE_CALLBACK(hash_aset_str)
  *     hsh[key] = value        -> value
  *     hsh.store(key, value)   -> value
  *
- *  Element Assignment---Associates the value given by
- *  <i>value</i> with the key given by <i>key</i>.
- *  <i>key</i> should not have its value changed while it is in
- *  use as a key (a <code>String</code> passed as a key will be
- *  duplicated and frozen).
+ *  == Element Assignment
+ *
+ *  Associates the value given by +value+ with the key given by +key+.
  *
  *     h = { "a" => 100, "b" => 200 }
  *     h["a"] = 9
  *     h["c"] = 4
  *     h   #=> {"a"=>9, "b"=>200, "c"=>4}
  *
+ *  +key+ should not have its value changed while it is in use as a key (an
+ *  <tt>unfrozen String</tt> passed as a key will be duplicated and frozen).
+ *
+ *     a = "a"
+ *     b = "b".freeze
+ *     h = { a => 100, b => 200 }
+ *     h.key(100).equal? a #=> false
+ *     h.key(200).equal? b #=> true
+ *
  */
 
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