--- lwp-2.4/src/lwp_ucontext.c	2006-07-19 21:52:24.000000000 +0200
+++ lwp-2.4/src/lwp_ucontext.c	2008-07-12 19:01:57.865778827 +0200
@@ -18,6 +18,8 @@
 #include <stdlib.h>
 #include <assert.h>
 #include <stdarg.h>
+#include <string.h>
+#include <unistd.h>
 #include "lwp_ucontext.h"
 
 /* if we already have ucontext.h we don't need any of this */