1 files changed, 1 insertions, 0 deletions
diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index 2fa96373b6..f902a65f34 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -4034,6 +4034,7 @@ vm_declare_class(ID id, rb_num_t flags, VALUE cbase, VALUE super)
     /* new class declaration */
     VALUE s = VM_DEFINECLASS_HAS_SUPERCLASS_P(flags) ? super : rb_cObject;
     VALUE c = declare_under(id, cbase, rb_define_class_id(id, s));
+    rb_define_alloc_func(c, rb_get_alloc_func(c));
     rb_class_inherited(s, c);
     return c;
 }