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-rw-r--r--src/kernel.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/kernel.c b/src/kernel.c
index e9dc93bbd..8551b50ea 100644
--- a/src/kernel.c
+++ b/src/kernel.c
@@ -282,7 +282,9 @@ init_copy(mrb_state *mrb, mrb_value dest, mrb_value obj)
case MRB_TT_CLASS:
case MRB_TT_MODULE:
copy_class(mrb, dest, obj);
- /* fall through */
+ mrb_iv_copy(mrb, dest, obj);
+ mrb_iv_remove(mrb, dest, mrb_intern_lit(mrb, "__classname__"));
+ break;
case MRB_TT_OBJECT:
case MRB_TT_SCLASS:
case MRB_TT_HASH: