diff --git a/include/fast_io_core_impl/freestanding/algorithm.h b/include/fast_io_core_impl/freestanding/algorithm.h
index 83b687f46..f04ccc09a 100644
--- a/include/fast_io_core_impl/freestanding/algorithm.h
+++ b/include/fast_io_core_impl/freestanding/algorithm.h
@@ -144,7 +144,7 @@ inline constexpr Iter find(Iter first, Iter last, T t)
 	}
 	return last;
 }
-
+#if 0
 template <::std::input_iterator Iter, ::std::integral T>
 // requires (::std::is_trivially_copyable_v<T>&&sizeof(T)<=sizeof(::std::uintmax_t))
 	requires(::std::is_trivially_copyable_v<T>)
@@ -159,7 +159,7 @@ inline constexpr Iter find_not(Iter first, Iter last, T t)
 	}
 	return last;
 }
-
+#endif
 template <::std::input_iterator Iter, ::std::input_iterator Iter2>
 struct mismatch_result
 {