diff --git a/job.h b/job.h
index abd7167e..ca7ad1dc 100644
--- a/job.h
+++ b/job.h
@@ -1,5 +1,5 @@
 /* Definitions for managing subprocesses in GNU Make.
-Copyright (C) 1992, 1993 Free Software Foundation, Inc.
+Copyright (C) 1992, 1993, 1996 Free Software Foundation, Inc.
 This file is part of GNU Make.
 
 GNU Make is free software; you can redistribute it and/or modify
@@ -66,6 +66,7 @@ extern void exec_command PARAMS ((char **argv, char **envp));
 
 extern unsigned int job_slots_used;
 
+extern void block_sigs PARAMS ((void));
 #ifdef POSIX
 extern void unblock_sigs PARAMS ((void));
 #else