diff --git a/ChangeLog b/ChangeLog
index 80c7482b1d..975195967a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Sat Aug 25 09:39:50 2007  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* array.c (rb_ary_s_try_convert): more document description.
+
+	* re.c (rb_reg_s_try_convert): typo fixed.
+
 Sat Aug 25 08:54:12 2007  Koichi Sasada  <ko1@atdot.net>
 
 	* id.h, id.c: remove idFuncall.
diff --git a/array.c b/array.c
index 24f1eae74c..a7361661c4 100644
--- a/array.c
+++ b/array.c
@@ -249,11 +249,20 @@ rb_check_array_type(VALUE ary)
  *
  *  Try to convert <i>obj</i> into an array, using to_ary method.
  *  Returns converted array or nil if <i>obj</i> cannot be converted
- *  for any reason.
+ *  for any reason.  This method is to check if an argument is an
+ *  array.  
  *
  *     Array.try_convert([1])   # => [1]
  *     Array.try_convert("1")   # => nil
+ *     
+ *     if tmp = Array.try_convert(arg)
+ *       # the argument is an array
+ *     elsif tmp = String.try_convert(arg)
+ *       # the argument is a string
+ *     end
+ *
  */
+
 static VALUE
 rb_ary_s_try_convert(VALUE dummy, VALUE ary)
 {
diff --git a/re.c b/re.c
index 6f2f3c0e23..824d56210c 100644
--- a/re.c
+++ b/re.c
@@ -2042,8 +2042,8 @@ rb_check_regexp_type(VALUE re)
  *  Returns converted regexp or nil if <i>obj</i> cannot be converted
  *  for any reason.
  *
- *     IO.try_convert(/re/)      # => /re/
- *     IO.try_convert("re")      # => nil
+ *     Regexp.try_convert(/re/)      # => /re/
+ *     Regexp.try_convert("re")      # => nil
  */
 static VALUE
 rb_reg_s_try_convert(VALUE dummy, VALUE re)