diff --git a/ChangeLog b/ChangeLog
index 1b661462a7..aab88e3531 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Fri Sep  9 21:56:40 2011  Ayumu AIZAWA  <ayumu.aizawa@gmail.com>
+
+	* ext/bigdecimal/bigdecimal.c (BigDecimal_abs): Fix comment.
+	  BigDecimal#sqrt requires argument. Reported by Makoto Kishimoto.
+	  Thanks for your contribution. [Bug #5267] [ruby-dev:44452]
+
 Fri Sep  9 11:00:55 2011  Shota Fukumori  <sorah@tubusu.net>
 
 	* test/rubygems/test_gem_commands_help_command.rb: Add one
diff --git a/ext/bigdecimal/bigdecimal.c b/ext/bigdecimal/bigdecimal.c
index 86070af3cb..e70406a0cf 100644
--- a/ext/bigdecimal/bigdecimal.c
+++ b/ext/bigdecimal/bigdecimal.c
@@ -1439,7 +1439,7 @@ BigDecimal_abs(VALUE self)
  *
  * Returns the square root of the value.
  *
- * If n is specified, returns at least that many significant digits.
+ * Result has at least n significant digits.
  */
 static VALUE
 BigDecimal_sqrt(VALUE self, VALUE nFig)