diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index adc1c1b8c..07334185d 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,8 @@
+2013-11-26  Corinna Vinschen  <corinna@vinschen.de>
+
+	* nlsfuncs.cc (wcscoll): Add "__restrict" to definition.
+	(wcsxfrm): Ditto.
+
 2013-11-26  Corinna Vinschen  <corinna@vinschen.de>
 
 	* common.din: Export posix_spawn[...] functions.
diff --git a/winsup/cygwin/nlsfuncs.cc b/winsup/cygwin/nlsfuncs.cc
index d059498d1..f7031f92e 100644
--- a/winsup/cygwin/nlsfuncs.cc
+++ b/winsup/cygwin/nlsfuncs.cc
@@ -1150,7 +1150,7 @@ __get_current_collate_codeset (void)
    transformation.  The advantage is that we don't need any files with
    collation information. */
 extern "C" int
-wcscoll (const wchar_t *ws1, const wchar_t *ws2)
+wcscoll (const wchar_t *__restrict ws1, const wchar_t *__restrict ws2)
 {
   int ret;
 
@@ -1204,7 +1204,7 @@ __collate_range_cmp (int c1, int c2)
 }
 
 extern "C" size_t
-wcsxfrm (wchar_t *ws1, const wchar_t *ws2, size_t wsn)
+wcsxfrm (wchar_t *__restrict ws1, const wchar_t *__restrict ws2, size_t wsn)
 {
   size_t ret;