diff --git a/libs/libc/wchar/Make.defs b/libs/libc/wchar/Make.defs
index 81ee284c5a8..f651aedbf84 100644
--- a/libs/libc/wchar/Make.defs
+++ b/libs/libc/wchar/Make.defs
@@ -27,6 +27,7 @@ CSRCS += lib_wcscoll.c lib_wcstol.c lib_wcstoll.c lib_wcstoul.c
 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
 
 # Add the wchar directory to the build
 
diff --git a/libs/libc/wchar/lib_wcscat.c b/libs/libc/wchar/lib_wcscat.c
new file mode 100644
index 00000000000..b94cb3c2c7a
--- /dev/null
+++ b/libs/libc/wchar/lib_wcscat.c
@@ -0,0 +1,56 @@
+/****************************************************************************
+ * libs/libc/wchar/lib_wcscat.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:  wcscat
+ *
+ * Description:
+ *    Concatenate two wide-character strings
+ *
+ * Input Parameters:
+ *   dest - the dest wchar string that contains the concatenated string
+ *   src - the source wchar string that we need to concatenate
+ *
+ * Returned Value:
+ *   The pointer point to the begin of the concatenated string
+ *
+ ****************************************************************************/
+
+FAR wchar_t *wcscat(FAR wchar_t *dest, FAR const wchar_t *src)
+{
+  wcscpy(dest + wcslen(dest), src);
+  return dest;
+}