diff --git a/ChangeLog b/ChangeLog
index e5c702d967..c8736b456c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Tue Nov  4 12:33:44 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
+
+	* object.c: fix document of Kernel.Stirng by @suzukaze
+	  [fix GH-743][ci skip]
+
 Tue Nov  4 12:21:45 2014  SHIBATA Hiroshi  <shibata.hiroshi@gmail.com>
 
 	* lib/csv.rb: added documentation for skip_blanks option by @decasia
diff --git a/object.c b/object.c
index f330aeeab5..5834c81e74 100644
--- a/object.c
+++ b/object.c
@@ -3018,8 +3018,9 @@ rb_String(VALUE val)
  *  call-seq:
  *     String(arg)   -> string
  *
- *  Converts <i>arg</i> to a <code>String</code> by calling its
- *  <code>to_s</code> method.
+ *  Returns <i>arg</i> as an <code>String</code>.
+ *
+ *  First tries to call its <code>to_str</code> method, then its <code>to_s</code> method.
  *
  *     String(self)        #=> "main"
  *     String(self.class)  #=> "Object"