diff --git a/ChangeLog b/ChangeLog
index 1df23beb11..03d0bc5759 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Tue Jul  4 21:48:56 2006  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	* ruby.c (proc_options): supress warning on DOSISH.
+
 Tue Jul  4 15:12:49 2006  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* eval.c (rb_call): should not set prot_tag->blkid since it would
diff --git a/ruby.c b/ruby.c
index 919a2eba24..594d728e9f 100644
--- a/ruby.c
+++ b/ruby.c
@@ -811,7 +811,8 @@ proc_options(int argc, char **argv)
 		script_node = NEW_BEGIN(0);
 	    }
 #if defined DOSISH || defined __CYGWIN__
-	    translate_char(script, '\\', '/');
+	    /* assume that we can change argv[n] if never change its length. */
+	    translate_char((char *)script, '\\', '/');
 #endif
 	    argc--; argv++;
 	}