diff --git a/libc/Makefile b/libc/Makefile
index b7be3eb4..1e0d9b70 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -131,6 +131,7 @@ vfscanf.o \
vsscanf.o \
wcrtomb.o \
wcscpy.o \
+wcslen.o \
wctomb.o \
wctype.o \
diff --git a/libc/include/wchar.h b/libc/include/wchar.h
index 2c92e70d..00d62976 100644
--- a/libc/include/wchar.h
+++ b/libc/include/wchar.h
@@ -64,6 +64,7 @@ struct tm;
size_t wcrtomb(char* restrict, wchar_t, mbstate_t* restrict);
size_t mbrtowc(wchar_t* restrict, const char* restrict, size_t, mbstate_t* restrict);
wchar_t* wcscpy(wchar_t* restrict, const wchar_t* restrict);
+size_t wcslen(const wchar_t*);
/* TODO: These are not implemented in sortix libc yet. */
#if defined(__SORTIX_SHOW_UNIMPLEMENTED)
@@ -99,7 +100,6 @@ size_t mbrlen(const char* restrict, size_t, mbstate_t* restrict);
size_t mbsrtowcs(wchar_t* restrict, const char** restrict, size_t, mbstate_t* restrict);
size_t wcscspn(const wchar_t*, const wchar_t*);
size_t wcsftime(wchar_t* restrict, size_t, const wchar_t* restrict, const struct tm* restrict);
-size_t wcslen(const wchar_t*);
size_t wcsrtombs(char* restrict, const wchar_t** restrict, size_t, mbstate_t* restrict);
size_t wcsspn(const wchar_t*, const wchar_t*);
size_t wcsxfrm(wchar_t* restrict, const wchar_t* restrict, size_t);
diff --git a/libc/wcslen.cpp b/libc/wcslen.cpp
new file mode 100644
index 00000000..f792b160
--- /dev/null
+++ b/libc/wcslen.cpp
@@ -0,0 +1,33 @@
+/*******************************************************************************
+
+ Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 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 .
+
+ wcslen.cpp
+ Returns the length of a string.
+
+*******************************************************************************/
+
+#include
+
+extern "C" size_t wcslen(const wchar_t* str)
+{
+ size_t ret = 0;
+ while ( str[ret] )
+ ret++;
+ return ret;
+}