diff -ru gnutls-3.6.14.orig/lib/system/sockets.c gnutls-3.6.14/lib/system/sockets.c

--- gnutls-3.6.14.orig/lib/system/sockets.c	2020-06-01 11:48:13.000000000 +0200

+++ gnutls-3.6.14/lib/system/sockets.c	2020-06-28 22:12:02.485455741 +0200

@@ -117,7 +117,7 @@

 system_writev(gnutls_transport_ptr_t ptr, const giovec_t * iovec,

 	      int iovec_cnt)

 {

-	return _system_writev(ptr, iovec, iovec_cnt, 0);

+	return writev(GNUTLS_POINTER_TO_INT(ptr), (struct iovec *) iovec, iovec_cnt);

 }

 #endif