diff -r 3ecddf168f1f configure.in
--- a/configure.in	Tue Nov 29 00:53:09 2011 +0100
+++ b/configure.in	Tue Nov 29 03:24:36 2011 -0800
@@ -3944,6 +3976,8 @@
 AC_MSG_CHECKING(for broken nice())
 AC_CACHE_VAL(ac_cv_broken_nice, [
 AC_RUN_IFELSE([AC_LANG_SOURCE([[
+#include <stdlib.h>
+#include <unistd.h>
 int main()
 {
 	int val1 = nice(1);