1 files changed, 1 insertions, 0 deletions
diff --git a/c/gbos.h b/c/gbos.h
index df52fbe..6ecbd4a 100644
--- a/c/gbos.h
+++ b/c/gbos.h
@@ -17,6 +17,7 @@ void          ssend(unsigned char b);   /* link-port: transmit one byte */
 unsigned char srecv(void);              /* link-port: receive one byte (blocks) */
 int           srecv_nb(void);           /* link-port: receive, or -1 if none */
 unsigned char pollin(void);             /* poll OSK for a typed char, or 0 */
+unsigned char sys_net(void *req);       /* socket layer trap (see sock.h)  */
 
 /* helpers (c/libc.c) */
 void          putu(unsigned int n);              /* print decimal          */