--- gcc/testsuite/g++.dg/ext/utf16-1.C.old	2013-07-13 16:56:08.500387672 -0400
+++ gcc/testsuite/g++.dg/ext/utf16-1.C	2013-07-13 16:58:06.633726139 -0400
@@ -19,11 +19,15 @@ const static char16_t	c9 = L'a';
 const static char16_t	ca = L'\u2029';
 const static char16_t	cb = L'\u8010';
 
+const static char16_t   cc = u'\uFFFF';
+
 #define A	0x0061
 #define D	0x0024
 #define X	0x2029
 #define Y	0x8010
 
+#define Z   0xFFFF
+
 int main ()
 {
     if (sizeof (u'a') != sizeof (char16_t))
@@ -62,4 +66,7 @@ int main ()
 	abort ();
     if (cb != Y)
 	abort ();
+
+    if (cc != Z)
+        abort();
 }