diff --git a/libc/Makefile b/libc/Makefile
index 4bb4859b..b19e3ae1 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -195,6 +195,7 @@ wchar/wcstoll.o \
 wchar/wcstol.o \
 wchar/wcstoull.o \
 wchar/wcstoul.o \
+wchar/wmemcmp.o \
 wctype/wctype.o \
 
 HOSTEDOBJS=\
diff --git a/libc/include/wchar.h b/libc/include/wchar.h
index a076c114..22f931c1 100644
--- a/libc/include/wchar.h
+++ b/libc/include/wchar.h
@@ -83,6 +83,7 @@ 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);
+int wmemcmp(const wchar_t*, const wchar_t*, size_t);
 
 /* TODO: These are not implemented in sortix libc yet. */
 #if defined(__SORTIX_SHOW_UNIMPLEMENTED)
@@ -106,7 +107,6 @@ int wcsncmp(const wchar_t*, const wchar_t*, size_t);
 int wcswidth(const wchar_t*, size_t);
 int wctob(wint_t);
 int wcwidth(wchar_t);
-int wmemcmp(const wchar_t*, const wchar_t*, size_t);
 int wprintf(const wchar_t* __restrict, ...);
 int wscanf(const wchar_t* __restrict, ...);
 long double wcstold(const wchar_t* __restrict, wchar_t** __restrict);
diff --git a/libc/wchar/wmemcmp.cpp b/libc/wchar/wmemcmp.cpp
new file mode 100644
index 00000000..5ada300f
--- /dev/null
+++ b/libc/wchar/wmemcmp.cpp
@@ -0,0 +1,37 @@
+/*******************************************************************************
+
+    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/wmemcmp.cpp
+    Compares two arrays of wide characters.
+
+*******************************************************************************/
+
+#include <wchar.h>
+
+extern "C" int wmemcmp(const wchar_t* a, const wchar_t* b, size_t n)
+{
+	for ( size_t i = 0; i < n; i++ )
+	{
+		if ( a[i] < b[i] )
+			return -1;
+		if ( b[i] < a[i] )
+			return 1;
+	}
+	return 0;
+}