diff --git a/mrbgems/mruby-sprintf/src/sprintf.c b/mrbgems/mruby-sprintf/src/sprintf.c
index 5d6401e3a..e083503ba 100644
--- a/mrbgems/mruby-sprintf/src/sprintf.c
+++ b/mrbgems/mruby-sprintf/src/sprintf.c
@@ -846,15 +846,6 @@ retry:
   }
 
   sprint_exit:
-#if 0
-  /* XXX - We cannot validate the number of arguments if (digit)$ style used.
-   */
-  if (posarg >= 0 && nextarg < argc) {
-    const char *mesg = "too many arguments for format string";
-    if (mrb_test(ruby_debug)) mrb_raise(mrb, E_ARGUMENT_ERROR, mesg);
-    if (mrb_test(ruby_verbose)) mrb_warn(mrb, mesg);
-  }
-#endif
   mrb_str_resize(mrb, result, blen);
 
   return result;