1 files changed, 1 insertions, 1 deletions
diff --git a/src/hash.c b/src/hash.c
index d94fc23b0..afcd3511d 100644
--- a/src/hash.c
+++ b/src/hash.c
@@ -800,7 +800,7 @@ mrb_hash_init(mrb_state *mrb, mrb_value hash)
   mrb_hash_modify(mrb, hash);
   if (!mrb_nil_p(block)) {
     if (ifnone_p) {
-      mrb_raise(mrb, E_ARGUMENT_ERROR, "wrong number of arguments");
+      mrb_num_args_error(mrb, 1, 0, 0);
     }
     RHASH(hash)->flags |= MRB_HASH_PROC_DEFAULT;
     ifnone = block;