diff --git a/ChangeLog b/ChangeLog
index b931484b2c..514cc6f4cc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,6 @@
-Mon Jun 23 13:45:30 2003  Tanaka Akira  <akr@m17n.org>
+Mon Jun 23 16:18:12 2003  Tanaka Akira  <akr@m17n.org>
+
+	* io.c (rb_open_file): initialize flags.
 
 	* time.c (time_arg): initialize v[6] even when argc is 10 to
 	  avoid valgrind error.
diff --git a/io.c b/io.c
index 662930a353..815d0dc8d4 100644
--- a/io.c
+++ b/io.c
@@ -2236,7 +2236,7 @@ rb_open_file(argc, argv, io)
 	}
 	else {
 	    SafeStringValue(vmode);
-	    rb_io_mode_modenum(RSTRING(vmode)->ptr);
+	    flags = rb_io_mode_modenum(RSTRING(vmode)->ptr);
 	}
 	fmode = NIL_P(perm) ? 0666 :  NUM2INT(perm);