--- lib/threads/posix/thread.cpp.orig	2004-08-10 18:29:40.072865000 -0500
+++ lib/threads/posix/thread.cpp	2004-08-10 18:29:46.896827600 -0500
@@ -29,6 +29,7 @@
 #include <string.h>
 #include <sched.h>                                                                                              
 #include "thread.h"
+#include <signal.h>
 
 #define DB printf("%s:%d\n", __FILE__, __LINE__);