diff --git a/libc/Makefile b/libc/Makefile
index e1568ded..e1946cba 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -196,6 +196,7 @@ wchar/wcstoll.o \
wchar/wcstol.o \
wchar/wcstoull.o \
wchar/wcstoul.o \
+wchar/wcsxfrm.o \
wchar/wmemcmp.o \
wctype/wctype.o \
diff --git a/libc/include/wchar.h b/libc/include/wchar.h
index cde93fe2..cd1e9e45 100644
--- a/libc/include/wchar.h
+++ b/libc/include/wchar.h
@@ -84,6 +84,7 @@ long long wcstoll(const wchar_t* __restrict, wchar_t** __restrict, int);
long wcstol(const wchar_t* __restrict, wchar_t** __restrict, int);
unsigned long long wcstoull(const wchar_t* __restrict, wchar_t** __restrict, int);
unsigned long wcstoul(const wchar_t* __restrict, wchar_t** __restrict, int);
+size_t wcsxfrm(wchar_t* __restrict, const wchar_t* __restrict, size_t);
int wmemcmp(const wchar_t*, const wchar_t*, size_t);
/* TODO: These are not implemented in sortix libc yet. */
@@ -111,7 +112,6 @@ int wprintf(const wchar_t* __restrict, ...);
int wscanf(const wchar_t* __restrict, ...);
long double wcstold(const wchar_t* __restrict, wchar_t** __restrict);
size_t wcsftime(wchar_t* __restrict, size_t, const wchar_t* __restrict, const struct tm* __restrict);
-size_t wcsxfrm(wchar_t* __restrict, const wchar_t* __restrict, size_t);
wchar_t* fgetws(wchar_t* __restrict, int, FILE* __restrict);
wchar_t* wcspbrk(const wchar_t*, const wchar_t*);
wchar_t* wcsstr(const wchar_t* __restrict, const wchar_t* __restrict);
diff --git a/libc/wchar/wcsxfrm.cpp b/libc/wchar/wcsxfrm.cpp
new file mode 100644
index 00000000..61bb9dae
--- /dev/null
+++ b/libc/wchar/wcsxfrm.cpp
@@ -0,0 +1,33 @@
+/*******************************************************************************
+
+ Copyright(C) Jonas 'Sortie' Termansen 2013.
+
+ This file is part of the Sortix C Library.
+
+ The Sortix C Library is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or (at your
+ option) any later version.
+
+ The Sortix C Library is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+ License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with the Sortix C Library. If not, see .
+
+ wchar/wcsxfrm.cpp
+ Transform a string such that the result of wcscmp is the same as wcscoll.
+
+*******************************************************************************/
+
+#include
+
+extern "C"
+size_t wcsxfrm(wchar_t* restrict dest, const wchar_t* restrict src, size_t n)
+{
+ size_t srclen = wcslen(src);
+ wcsncpy(dest, src, n);
+ return srclen;
+}