1 files changed, 2 insertions, 2 deletions
diff --git a/eval.c b/eval.c
index a7c5322567..5a6c9970d1 100644
--- a/eval.c
+++ b/eval.c
@@ -1132,11 +1132,11 @@ rb_using_refinement(NODE *cref, VALUE klass, VALUE module)
     Check_Type(klass, T_CLASS);
     Check_Type(module, T_MODULE);
     if (NIL_P(cref->nd_refinements)) {
-	cref->nd_refinements = hidden_identity_hash_new();
+	RB_OBJ_WRITE(cref, &cref->nd_refinements, hidden_identity_hash_new());
     }
     else {
 	if (cref->flags & NODE_FL_CREF_OMOD_SHARED) {
-	    cref->nd_refinements = rb_hash_dup(cref->nd_refinements);
+	    RB_OBJ_WRITE(cref, &cref->nd_refinements, rb_hash_dup(cref->nd_refinements));
 	    cref->flags &= ~NODE_FL_CREF_OMOD_SHARED;
 	}
 	if (!NIL_P(c = rb_hash_lookup(cref->nd_refinements, klass))) {