1 files changed, 3 insertions, 1 deletions
diff --git a/class.c b/class.c
index 21e39e2efe..b4614efadd 100644
--- a/class.c
+++ b/class.c
@@ -689,7 +689,9 @@ rb_include_class_new(VALUE module, VALUE super)
     }
     RCLASS_IV_TBL(klass) = RCLASS_IV_TBL(module);
     RCLASS_CONST_TBL(klass) = RCLASS_CONST_TBL(module);
-    RCLASS_M_TBL(klass) = RCLASS_M_TBL(RCLASS_ORIGIN(module));
+
+    RCLASS_M_TBL(OBJ_WB_GIVEUP(klass)) = RCLASS_M_TBL(OBJ_WB_GIVEUP(RCLASS_ORIGIN(module)));
+
     RCLASS_SET_SUPER(klass, super);
     if (RB_TYPE_P(module, T_ICLASS)) {
 	RBASIC_SET_CLASS(klass, RBASIC(module)->klass);