diff --git a/ChangeLog b/ChangeLog
index 9b682b0d3a..23dba079b8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+Tue Mar 24 17:08:52 2009  Akinori MUSHA  <knu@iDaemons.org>
+
+	* io.c (rb_io_inspect): Cannot access fptr->fd if fptr is NULL.
+	  This fixes a coredump caused by: ruby -e "class X < IO; def
+	  initialize; end; end; p X.new.inspect"
+
 Mon Mar 23 22:01:00 2009  Tanaka Akira  <akr@fsij.org>
 
 	* time.c (time_timespec): use NUM2TIMET.
diff --git a/io.c b/io.c
index 0a984a18db..19ea6132be 100644
--- a/io.c
+++ b/io.c
@@ -1387,8 +1387,9 @@ rb_io_inspect(VALUE obj)
     const char *st = "";
 
     fptr = RFILE(rb_io_taint_check(obj))->fptr;
+    if (!fptr) return rb_any_to_s(obj);
     cname = rb_obj_classname(obj);
-    if (!fptr || NIL_P(fptr->pathv)) {
+    if (NIL_P(fptr->pathv)) {
         if (fptr->fd < 0) {
             path = "";
             st = "(closed)";