diff --git a/libs/libc/wchar/Make.defs b/libs/libc/wchar/Make.defs
index c828561a14..9501bbd542 100644
--- a/libs/libc/wchar/Make.defs
+++ b/libs/libc/wchar/Make.defs
@@ -28,7 +28,7 @@ CSRCS += lib_wcstoull.c lib_wcstold.c lib_wcstof.c lib_wcstod.c
 CSRCS += lib_swprintf.c lib_mbsnrtowcs.c lib_wcsnrtombs.c lib_mbsinit.c
 CSRCS += lib_mbrlen.c lib_mbsrtowcs.c lib_wcsrtombs.c lib_wcscpy.c
 CSRCS += lib_wcscat.c lib_wcslcat.c lib_wcsncat.c lib_wcsrchr.c lib_wcschr.c
-CSRCS += lib_wcsncpy.c
+CSRCS += lib_wcsncpy.c lib_wcsncmp.c
 
 # Add the wchar directory to the build
 
diff --git a/libs/libc/wchar/lib_wcsncmp.c b/libs/libc/wchar/lib_wcsncmp.c
new file mode 100644
index 0000000000..1c2e19dd9b
--- /dev/null
+++ b/libs/libc/wchar/lib_wcsncmp.c
@@ -0,0 +1,62 @@
+/****************************************************************************
+ * libs/libc/wchar/lib_wcsncmp.c
+ *
+ * Copyright © 2005-2014 Rich Felker, et al.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <wchar.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name:  wcsncmp
+ *
+ * Description:
+ *    Compares up to "n" characters of the C wide string "l" to those of
+ *    the C wide string "r".
+ *
+ * Input Parameters:
+ *   l - the wchar string to be compared
+ *   r - the wchar string to be compared
+ *   n - maximum number of wide characters to be compared
+ *
+ * Returned Value:
+ *   Return 0 if the characters compared in both strings form the same
+ *   string.
+ *   Return value greater than 0 if the first character that does not match
+ *   has a greater value in "l" than in "r"
+ *   Reutrn value less than 0 otherswise
+ *
+ ****************************************************************************/
+
+int wcsncmp(FAR const wchar_t *l, FAR const wchar_t *r, size_t n)
+{
+  for (; n && *l == *r && *l && *r; n--, l++, r++);
+  return n ? *l - *r : 0;
+}