diff --git a/ChangeLog b/ChangeLog
index 821012d9e6..85208c05f7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Sep  4 09:46:18 2008  Tanaka Akira  <akr@fsij.org>
+
+	* io.c (rb_scan_open_args): follow rb_str_transcode change.
+
 Thu Sep  4 08:59:29 2008  Tanaka Akira  <akr@fsij.org>
 
 	* file.c (rb_find_file): fix GC problem on Debian GNU/Linux (IA64)
diff --git a/io.c b/io.c
index 6c9707ab48..39ee4d7c2f 100644
--- a/io.c
+++ b/io.c
@@ -4606,7 +4606,7 @@ rb_scan_open_args(int argc, VALUE *argv,
 	    static VALUE fs_enc;
 	    if (!fs_enc)
 		fs_enc = rb_enc_from_encoding(fs_encoding);
-	    fname = rb_str_transcode(fname, fs_enc, 0);
+	    fname = rb_str_transcode(fname, fs_enc, 0, Qnil);
 	}
     }
 #endif