diff --git a/ChangeLog b/ChangeLog
index 5dc077a838..5ef0230e24 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Nov 14 23:39:00 2013  CHIKANAGA Tomoyuki  <nagachika@ruby-lang.org>
+
+	* ext/bigdecimal/lib/bigdecimal/util.rb: [DOC] remove example of
+	  Rational#to_d without argument. [Bug #8958]
+
 Thu Nov 14 20:24:15 2013  Naohisa Goto  <ngotogenome@gmail.com>
 
 	* ruby_atomic.h (ATOMIC_SIZE_CAS): fix compile error on Solaris
diff --git a/ext/bigdecimal/lib/bigdecimal/util.rb b/ext/bigdecimal/lib/bigdecimal/util.rb
index a6c585d59e..82c82c8e1e 100644
--- a/ext/bigdecimal/lib/bigdecimal/util.rb
+++ b/ext/bigdecimal/lib/bigdecimal/util.rb
@@ -115,8 +115,6 @@ class Rational < Numeric
   #
   #   r = (22/7.0).to_r
   #   # => (7077085128725065/2251799813685248)
-  #   r.to_d
-  #   # => #<BigDecimal:1a52bd8,'0.3142857142 8571427937 0154144999 105E1',45(63)>
   #   r.to_d(3)
   #   # => #<BigDecimal:1a44d08,'0.314E1',18(36)>
   def to_d(precision)