diff --git a/src/libthread/threadimpl.h b/src/libthread/threadimpl.h
index e88e321..d30d58b 100644
--- a/src/libthread/threadimpl.h
+++ b/src/libthread/threadimpl.h
@@ -42,7 +42,11 @@
 {
 	Lock		*l;
 	int		asleep;
+#ifdef PLAN9PORT_USING_PTHREADS
 	pthread_cond_t	cond;
+#else
+	int		pid;
+#endif
 };
 
 extern	void	_procsleep(_Procrendez*);
@@ -50,7 +54,14 @@
 
 struct Proc
 {
-	pthread_t	tid;
+	Proc		*next;
+	Proc		*prev;
+	char		msg[128];
+#ifdef PLAN9PORT_USING_PTHREADS
+	pthread_t	osprocid;
+#else
+	uint		osprocid;
+#endif
 	Lock		lock;
 	_Thread		*thread;
 	_Threadlist	runqueue;
@@ -63,10 +74,12 @@
 	Jmp		sigjmp;
 };
 
-extern Proc *xxx;
 #define proc() _threadproc()
 #define setproc(p) _threadsetproc(p)
 
+extern Proc *_threadprocs;
+extern Lock _threadprocslock;
+
 extern void _procstart(Proc*, void (*fn)(Proc*));
 extern _Thread *_threadcreate(Proc*, void(*fn)(void*), void*, uint);
 extern void _threadexit(void);