diff --git a/libc/include/wchar.h b/libc/include/wchar.h
index 1cf498c83..f33af5f 100644
--- a/libc/include/wchar.h
+++ b/libc/include/wchar.h
@@ -81,6 +81,7 @@
 wchar_t* wcscpy(wchar_t* __dst, const wchar_t* __src);
 size_t wcscspn(const wchar_t* __s, const wchar_t* __accept);
 size_t wcsftime(wchar_t* __buf, size_t __n, const wchar_t* __fmt, const struct tm* __tm);
+size_t wcsftime_l(wchar_t* __buf, size_t __n, const wchar_t* __fmt, const struct tm* __tm, locale_t __l) __INTRODUCED_IN(28);
 size_t wcslen(const wchar_t* __s);
 int wcsncasecmp(const wchar_t* __lhs, const wchar_t* __rhs, size_t __n);
 int wcsncasecmp_l(const wchar_t* __lhs, const wchar_t* __rhs, size_t __n, locale_t __l) __INTRODUCED_IN(23);
@@ -94,12 +95,16 @@
 size_t wcsspn(const wchar_t* __s, const wchar_t* __accept);
 wchar_t* wcsstr(const wchar_t* __haystack, const wchar_t* __needle);
 double wcstod(const wchar_t* __s, wchar_t** __end_ptr);
+double wcstod_l(const wchar_t* __s, wchar_t** __end_ptr, locale_t __l) __INTRODUCED_IN(28);
 float wcstof(const wchar_t* __s, wchar_t** __end_ptr) __INTRODUCED_IN(21);
+float wcstof_l(const wchar_t* __s, wchar_t** __end_ptr, locale_t __l) __INTRODUCED_IN(28);
 wchar_t* wcstok(wchar_t* __s, const wchar_t* __delimiter, wchar_t** __ptr);
 long wcstol(const wchar_t* __s, wchar_t** __end_ptr, int __base);
+long wcstol_l(const wchar_t* __s, wchar_t** __end_ptr, int __base, locale_t __l) __INTRODUCED_IN(28);
 long long wcstoll(const wchar_t* __s, wchar_t** __end_ptr, int __base) __INTRODUCED_IN(21);
 long double wcstold(const wchar_t* __s, wchar_t** __end_ptr) __RENAME_LDBL(wcstod, 3, 21);
 unsigned long wcstoul(const wchar_t* __s, wchar_t** __end_ptr, int __base);
+unsigned long wcstoul_l(const wchar_t* __s, wchar_t** __end_ptr, int __base, locale_t __l) __INTRODUCED_IN(28);
 unsigned long long wcstoull(const wchar_t* __s, wchar_t** __end_ptr, int __base) __INTRODUCED_IN(21);
 int wcswidth(const wchar_t* __s, size_t __n);
 size_t wcsxfrm(wchar_t* __dst, const wchar_t* __src, size_t __n);