1 files changed, 1 insertions, 1 deletions
diff --git a/compile.c b/compile.c
index d7c05b2e87..004d38670c 100644
--- a/compile.c
+++ b/compile.c
@@ -579,7 +579,7 @@ static int
 iseq_add_mark_object_compile_time(const rb_iseq_t *iseq, VALUE v)
 {
     if (!SPECIAL_CONST_P(v)) {
-	rb_ary_push(ISEQ_COMPILE_DATA(iseq)->mark_ary, v);
+        RB_OBJ_WRITTEN(iseq, Qundef, v);
     }
     return COMPILE_OK;
 }