1 files changed, 3 insertions, 0 deletions
diff --git a/variable.c b/variable.c
index 4f924813fa..5ae2d3e3b0 100644
--- a/variable.c
+++ b/variable.c
@@ -2255,6 +2255,9 @@ each_hash_iv(st_data_t id, st_data_t val, st_data_t data)
 {
     struct iv_itr_data * itr_data = (struct iv_itr_data *)data;
     rb_ivar_foreach_callback_func *callback = itr_data->func;
+    if (is_internal_id((ID)id)) {
+        return ST_CONTINUE;
+    }
     return callback((ID)id, (VALUE)val, itr_data->arg);
 }