Prefer `rb_error_arity` to `rb_check_arity` when it can be used

1 files changed, 1 insertions, 1 deletions

diff --git a/string.c b/string.c
index 8d7d2ad7b9..f76a417d45 100644
--- a/string.c
+++ b/string.c
@@ -5186,7 +5186,7 @@ str_gsub(int argc, VALUE *argv, VALUE str, int bang)
 	tainted = OBJ_TAINTED_RAW(repl);
 	break;
       default:
-	rb_check_arity(argc, 1, 2);
+	rb_error_arity(argc, 1, 2);
     }
 
     pat = get_pat_quoted(argv[0], 1);