diff --git a/ChangeLog b/ChangeLog
index 2f4e8e7e42..9f1b24f7bc 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Dec 12 16:26:31 2002  Nobuyoshi Nakada  <nobu.nokada@softhome.net>
+
+	* marshal.c (r_object0): singleton class instance can't be loaded.
+	  (ruby-bugs-ja:PR#366)
+
 Wed Dec 11 23:35:43 2002  WATANABE Hirofumi  <eban@ruby-lang.org>
 
 	* ext/extmk.rb (create_makefile): -no-undefined -> --no-undefined.
diff --git a/marshal.c b/marshal.c
index cc0ccbb35d..5d34b9e4c8 100644
--- a/marshal.c
+++ b/marshal.c
@@ -902,6 +902,9 @@ r_object0(arg, proc)
 	{
 	    VALUE c = path2class(r_unique(arg));
 
+	    if (FL_TEST(c, FL_SINGLETON)) {
+		rb_raise(rb_eTypeError, "singleton can't be loaded");
+	    }
 	    v = r_object0(arg, 0);
 	    if (rb_special_const_p(v) || TYPE(v) == T_OBJECT || TYPE(v) == T_CLASS) {
 	      format_error: