diff --git a/src/threads.h b/src/threads.h
index 9113c606b7b861153ef6f4b18cc2a3e649f47272..61f1ac3b147f4d2bd1a95a6fd8b039c31a4670d9 100644
--- a/src/threads.h
+++ b/src/threads.h
@@ -1,5 +1,5 @@
 /*
- * $Id: threads.h,v 1.42 1998/04/30 16:31:20 hubbe Exp $
+ * $Id: threads.h,v 1.43 1998/06/25 14:50:25 grubba Exp $
  */
 #ifndef THREADS_H
 #define THREADS_H
@@ -440,6 +440,9 @@ struct thread_state *thread_state_for_id(THREAD_T tid);
 struct object *thread_for_id(THREAD_T tid);
 void f_all_threads(INT32 args);
 
+void init_threads_disable(struct object *o);
+void exit_threads_disable(struct object *o);
+
 /* Prototypes end here */
 
 #else
@@ -461,6 +464,10 @@ void f_all_threads(INT32 args);
 #define th_self() ((void*)0)
 #define co_signal(X)
 #define co_broadcast(X)
+
+#define init_threads_disable(X)
+#define exit_threads_disable(X)
+
 #endif /* _REENTRANT */
 
 #ifdef __NT__