diff --git a/libc/Makefile b/libc/Makefile
index 7b66466b..ded8c575 100644
--- a/libc/Makefile
+++ b/libc/Makefile
@@ -256,6 +256,7 @@ wchar/wcscspn.o \
 wchar/wcsdup.o \
 wchar/wcsftime.o \
 wchar/wcslen.o \
+wchar/wcsncasecmp.o \
 wchar/wcsncat.o \
 wchar/wcsncmp.o \
 wchar/wcsncpy.o \
diff --git a/libc/include/wchar.h b/libc/include/wchar.h
index a8f0d9f6..f5bc6a84 100644
--- a/libc/include/wchar.h
+++ b/libc/include/wchar.h
@@ -203,7 +203,7 @@ 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); */
 wchar_t* wcsdup(const wchar_t*);
-/* TODO: int wcsncasecmp(const wchar_t*, const wchar_t *, size_t); */
+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); */
 size_t wcsnrtombs(char* __restrict, const wchar_t** __restrict, size_t, size_t, mbstate_t* __restrict);
diff --git a/libc/wchar/wcsncasecmp.cpp b/libc/wchar/wcsncasecmp.cpp
new file mode 100644
index 00000000..8ac3ce07
--- /dev/null
+++ b/libc/wchar/wcsncasecmp.cpp
@@ -0,0 +1,42 @@
+/*******************************************************************************
+
+    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/wcsncasecmp.cpp
+    Compares a prefix of two strings ignoring case.
+
+*******************************************************************************/
+
+#include <wchar.h>
+#include <wctype.h>
+
+extern "C"
+int wcsncasecmp(const wchar_t* a, const wchar_t* b, size_t maxcount)
+{
+	while ( maxcount-- )
+	{
+		wchar_t ac = towlower(*a++), bc = towlower(*b++);
+		if ( ac == L'\0' && bc == L'\0' )
+			return 0;
+		if ( ac < bc )
+			return -1;
+		if ( ac > bc )
+			return 1;
+	}
+	return 0;
+}