1 files changed, 1 insertions, 1 deletions
diff --git a/vm.c b/vm.c
index 4810321d6f..d90cb2f472 100644
--- a/vm.c
+++ b/vm.c
@@ -2736,7 +2736,7 @@ core_hash_merge_kwd(int argc, VALUE *argv)
     rb_check_arity(argc, 1, 2);
     hash = argv[0];
     kw = argv[argc-1];
-    kw = rb_convert_type(kw, T_HASH, "Hash", "to_hash");
+    kw = rb_convert_type_with_id(kw, T_HASH, "Hash", idTo_hash);
     if (argc < 2) hash = kw;
     rb_hash_foreach(kw, argc < 2 ? kwcheck_i : kwmerge_i, hash);
     return hash;