diff --git a/ChangeLog b/ChangeLog
index 2ffd04b0b7..0c3fbea8c4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Apr 21 01:30:02 2011  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* random.c (rb_f_srand): fix rdoc: srand(0)'s 0 is a seed.
+	  [ruby-core:35833] fixes #4590
+
 Thu Apr 21 01:01:28 2011  Masaya Tarui  <tarui@ruby-lang.org>
 
 	* win32/win32.c (CreateChild): maximum length of lpCommandLine is
diff --git a/random.c b/random.c
index d982744dab..15a7f51a06 100644
--- a/random.c
+++ b/random.c
@@ -760,8 +760,8 @@ random_load(VALUE obj, VALUE dump)
  *     srand(number=0)    -> old_seed
  *
  *  Seeds the pseudorandom number generator to the value of
- *  <i>number</i>. If <i>number</i> is omitted
- *  or zero, seeds the generator using a combination of the time, the
+ *  <i>number</i>. If <i>number</i> is omitted,
+ *  seeds the generator using a combination of the time, the
  *  process id, and a sequence number. (This is also the behavior if
  *  <code>Kernel::rand</code> is called without previously calling
  *  <code>srand</code>, but without the sequence.) By setting the seed