diff --git a/sys/arch/i386/i386/svr4_machdep.c b/sys/arch/i386/i386/svr4_machdep.c
index db67bb6c266a..2722a43430ac 100644
--- a/sys/arch/i386/i386/svr4_machdep.c
+++ b/sys/arch/i386/i386/svr4_machdep.c
@@ -1,4 +1,4 @@
-/*	$NetBSD: svr4_machdep.c,v 1.44 1999/01/21 23:07:20 christos Exp $	 */
+/*	$NetBSD: svr4_machdep.c,v 1.45 1999/09/07 18:20:40 christos Exp $	 */
 
 /*-
  * Copyright (c) 1994 The NetBSD Foundation, Inc.
@@ -56,6 +56,7 @@
 #include <sys/exec_elf.h>
 
 #include <compat/svr4/svr4_types.h>
+#include <compat/svr4/svr4_lwp.h>
 #include <compat/svr4/svr4_ucontext.h>
 #include <compat/svr4/svr4_syscallargs.h>
 #include <compat/svr4/svr4_util.h>