Index: acinclude.m4
===================================================================
--- acinclude.m4	(revision 192186)
+++ acinclude.m4	(working copy)
@@ -1251,6 +1251,8 @@ AC_DEFUN([GLIBCXX_ENABLE_LIBSTDCXX_TIME]
 	],
 	[#if _POSIX_TIMERS > 0
 	  timespec tp;
+	 #else
+	  struct timespec tp;
 	 #endif
 	  nanosleep(&tp, 0);
 	], [ac_has_nanosleep=yes], [ac_has_nanosleep=no])