1 files changed, 1 insertions, 1 deletions
diff --git a/object.c b/object.c
index 54f516314e..c64af1d79c 100644
--- a/object.c
+++ b/object.c
@@ -1587,7 +1587,7 @@ rb_mod_to_s(VALUE klass)
 
     if (FL_TEST(klass, FL_SINGLETON)) {
         VALUE s = rb_usascii_str_new2("#<Class:");
-        VALUE v = rb_ivar_get(klass, id__attached__);
+        VALUE v = RCLASS_ATTACHED_OBJECT(klass);
 
         if (CLASS_OR_MODULE_P(v)) {
             rb_str_append(s, rb_inspect(v));