diff --git a/include/fast_io_dsal/impl/string.h b/include/fast_io_dsal/impl/string.h
index 326ee865..5c1d2de1 100644
--- a/include/fast_io_dsal/impl/string.h
+++ b/include/fast_io_dsal/impl/string.h
@@ -1468,7 +1468,7 @@ class
 };
 
 template <::std::integral chtype, typename allocator1, typename U>
-inline constexpr void erase(::fast_io::containers::basic_string<chtype, allocator1> const &c, U const &value)
+inline constexpr void erase(::fast_io::containers::basic_string<chtype, allocator1> &c, U const &value)
 {
 	auto it = ::std::remove(c.begin(), c.end(), value);
 	auto r = c.end() - it;
@@ -1477,7 +1477,7 @@ inline constexpr void erase(::fast_io::containers::basic_string<chtype, allocato
 }
 
 template <::std::integral chtype, typename allocator1, typename Pred>
-inline constexpr void erase_if(::fast_io::containers::basic_string<chtype, allocator1> const &c, Pred pred)
+inline constexpr void erase_if(::fast_io::containers::basic_string<chtype, allocator1> &c, Pred pred)
 {
 	auto it = ::std::remove_if(c.begin(), c.end(), pred);
 	auto r = c.end() - it;