1 files changed, 1 insertions, 0 deletions
diff --git a/object.c b/object.c
index dbb8db63dd..1177466d7f 100644
--- a/object.c
+++ b/object.c
@@ -342,6 +342,7 @@ rb_obj_init_copy(VALUE obj, VALUE orig)
 {
     if (obj == orig) return obj;
     rb_check_frozen(obj);
+    rb_check_trusted(obj);
     if (TYPE(obj) != TYPE(orig) || rb_obj_class(obj) != rb_obj_class(orig)) {
 	rb_raise(rb_eTypeError, "initialize_copy should take same class object");
     }