1 files changed, 1 insertions, 1 deletions
diff --git a/src/vm.c b/src/vm.c
index 5f6ace0d8..715c3db6b 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -813,7 +813,7 @@ localjump_error(mrb_state *mrb, localjump_error_kind kind)
   mrb_value msg;
   mrb_value exc;
 
-  msg = mrb_str_buf_new(mrb, sizeof(lead) + 7);
+  msg = mrb_str_new_capa(mrb, sizeof(lead) + 7);
   mrb_str_cat(mrb, msg, lead, sizeof(lead) - 1);
   mrb_str_cat(mrb, msg, kind_str[kind], kind_str_len[kind]);
   exc = mrb_exc_new_str(mrb, E_LOCALJUMP_ERROR, msg);