diff --git a/sys/arch/mac68k/include/cpu.h b/sys/arch/mac68k/include/cpu.h
index 71053a3577a6..92a2c5c5a4d3 100644
--- a/sys/arch/mac68k/include/cpu.h
+++ b/sys/arch/mac68k/include/cpu.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: cpu.h,v 1.29 1996/05/05 06:17:36 briggs Exp $	*/
+/*	$NetBSD: cpu.h,v 1.30 1996/05/05 06:43:33 briggs Exp $	*/
 
 /*
  * Copyright (c) 1988 University of Utah.
@@ -348,4 +348,10 @@ extern	unsigned long		load_addr;
 #define CACHE4_ON	(IC4_ENABLE|DC4_ENABLE)
 #define CACHE4_OFF	0x00000000
 
+__BEGIN_DECLS
+#if defined(COMPAT_SUNOS)
+void	sunos_sendsig __P((sig_t, int, int, u_long));
+#endif
+__END_DECLS
+
 #endif	/* _CPU_MACHINE_ */