The file to patch was changed for this version as
the upstream version renamed port-tun.c to port-net.c

ref: https://github.com/openssh/openssh-portable/commit/f5594f939f844bbb688313697d6676238da355b3

---
 openbsd-compat/port-net.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/openbsd-compat/port-net.c b/openbsd-compat/port-net.c
index 198e73f..421d8ac 100644
--- a/openbsd-compat/port-net.c
+++ b/openbsd-compat/port-net.c
@@ -37,6 +37,10 @@
 #include "channels.h"
 #include "ssherr.h"
 
+#ifndef bcopy
+#define bcopy(x,y,z) memcpy((y),(x),(z))
+#endif
+
 /*
  * This file contains various portability code for network support,
  * including tun/tap forwarding and routing domains.
-- 
2.34.1