diff --git a/libc/Makefile b/libc/Makefile
index 4a03450b..7b66466b 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -253,6 +253,7 @@ wchar/wcscmp.o \
 wchar/wcscoll.o \
 wchar/wcscpy.o \
 wchar/wcscspn.o \
+wchar/wcsdup.o \
 wchar/wcsftime.o \
 wchar/wcslen.o \
 wchar/wcsncat.o \
diff --git a/libc/include/wchar.h b/libc/include/wchar.h
index 72d663b2..a8f0d9f6 100644
--- a/libc/include/wchar.h
+++ b/libc/include/wchar.h
@@ -202,7 +202,7 @@ wchar_t* wcpncpy(wchar_t* __restrict, const wchar_t* __restrict, size_t);
 int wcscasecmp(const wchar_t*, const wchar_t*);
 /* TODO: int wcscasecmp_l(const wchar_t*, const wchar_t*, locale_t); */
 /* TODO: int wcscoll_l(const wchar_t*, const wchar_t*, locale_t); */
-/* TODO: wchar_t* wcsdup(const wchar_t*); */
+wchar_t* wcsdup(const wchar_t*);
 /* TODO: int wcsncasecmp(const wchar_t*, const wchar_t *, size_t); */
 /* TODO: int wcsncasecmp_l(const wchar_t*, const wchar_t *, size_t, locale_t); */
 /* TODO: size_t wcsnlen(const wchar_t*, size_t); */
diff --git a/libc/wchar/wcsdup.cpp b/libc/wchar/wcsdup.cpp
new file mode 100644
index 00000000..030dbd04
--- /dev/null
+++ b/libc/wchar/wcsdup.cpp
@@ -0,0 +1,36 @@
+/*******************************************************************************
+
+    Copyright(C) Jonas 'Sortie' Termansen 2014.
+
+    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/wcsdup.cpp
+    Creates a copy of a string.
+
+*******************************************************************************/
+
+#include <stdlib.h>
+#include <wchar.h>
+
+extern "C" wchar_t* wcsdup(const wchar_t* input)
+{
+	size_t input_length = wcslen(input);
+	wchar_t* result = (wchar_t*) malloc(sizeof(wchar_t) * (input_length + 1));
+	if ( !result )
+		return NULL;
+	wmemcpy(result, input, input_length + 1);
+	return result;
+}