diff --git a/include/thread.h b/include/thread.h
index 23c4a529..a65ebe79 100644
--- a/include/thread.h
+++ b/include/thread.h
@@ -23,6 +23,11 @@ void		_threadsleep(Rendez*);
 _Thread	*_threadwakeup(Rendez*);
 #define	yield		threadyield
 
+/*
+ * signals
+ */
+void		threadnotify(int(*f)(void*,char*), int);
+
 /*
  * daemonize
  *