diff --git a/sh.h b/sh.h
index 7d62432..0aab302 100644
--- a/sh.h
+++ b/sh.h
@@ -1,16 +1,15 @@
-/**	$MirBSD: src/bin/ksh/sh.h,v 2.11 2004/12/31 19:37:03 tg Exp $ */
+/**	$MirBSD: src/bin/ksh/sh.h,v 2.12 2004/12/31 19:54:16 tg Exp $ */
 /*	$OpenBSD: sh.h,v 1.23 2004/12/18 22:11:43 millert Exp $	*/
+/*	$From: sh.h,v 1.2 1994/05/19 18:32:40 michael Exp michael $ */
 
 #ifndef SH_H
-/*	$OpenBSD: sh.h,v 1.22 2004/12/18 21:58:39 millert Exp $	*/
+#define SH_H
 
 /*
  * mirbsdksh - MirOS Project Korn-Shell
  * from: Public Domain Bourne/Korn shell
  */
 
-/* $From: sh.h,v 1.2 1994/05/19 18:32:40 michael Exp michael $ */
-
 #include "config.h"	/* system and option configuration info */
 
 /* Start of common headers */
@@ -180,6 +179,10 @@ void *memmove(void *d, const void *s, size_t n);
 /* this is a hang-over from older versions of the os2 port */
 #define ksh_dupbase(fd, base) fcntl(fd, F_DUPFD, base)
 
+#if defined(__sun__) && defined(__svr4__)
+typedef void (*sig_t)();
+#endif
+
 #ifdef HAVE_SIGSETJMP
 # define ksh_sigsetjmp(env,sm)	sigsetjmp((env), (sm))
 # define ksh_siglongjmp(env,v)	siglongjmp((env), (v))