1 files changed, 6 insertions, 1 deletions

diff --git a/src/regress/lib/libc/sys/t_syscall.c b/src/regress/lib/libc/sys/t_syscall.c
index e864970262..72ad9139d6 100644
--- a/src/regress/lib/libc/sys/t_syscall.c
+++ b/src/regress/lib/libc/sys/t_syscall.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: t_syscall.c,v 1.1.1.1 2019/11/19 19:57:04 bluhm Exp $ */
+/*      $OpenBSD: t_syscall.c,v 1.2 2020/11/10 14:43:14 bluhm Exp $     */
 /*      $NetBSD: t_syscall.c,v 1.3 2018/05/28 07:55:56 martin Exp $     */
 
 /*-
@@ -47,6 +47,11 @@ __RCSID("$NetBSD: t_syscall.c,v 1.3 2018/05/28 07:55:56 martin Exp $");
 #include <sys/endian.h>
 #include <sys/syscall.h>
 
+#ifdef __OpenBSD__
+/* Declare prototype of __syscall locally specifying the return type. */
+quad_t __syscall(quad_t number, ...);
+#endif
+
 #if !defined(_LP64) && BYTE_ORDER == _BIG_ENDIAN
 #define __SYSCALL_TO_UINTPTR_T(V)       ((uintptr_t)((V)>>32))
 #else