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 <http://www.gnu.org/licenses/>.
+
+    wchar/wcsxfrm.cpp
+    Transform a string such that the result of wcscmp is the same as wcscoll.
+
+*******************************************************************************/
+
+#include <wchar.h>
+
+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;
+}