diff --git a/ChangeLog b/ChangeLog
index 9d13c68e90..f80d700b2c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Fri Dec 19 15:51:48 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ruby.c (process_options): get rid of warning on DOSISH.
+
 Fri Dec 19 07:45:37 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* error.c (exc_equal): duck typing equal to make it transitive.
diff --git a/ruby.c b/ruby.c
index ee21195b95..aeb853e5d3 100644
--- a/ruby.c
+++ b/ruby.c
@@ -1281,7 +1281,7 @@ process_options(VALUE arg)
     opt->script_name = rb_str_new_cstr(opt->script);
     opt->script = RSTRING_PTR(opt->script_name);
 #if defined DOSISH || defined __CYGWIN__
-    translate_char(opt->script, '\\', '/');
+    translate_char(RSTRING_PTR(opt->script_name), '\\', '/');
 #endif
     rb_obj_freeze(opt->script_name);