diff --git a/include/net/sock.h b/include/net/sock.h
index a9ef3a6..6919276 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -484,6 +484,8 @@
 
 extern int sk_wait_data(struct sock *sk, long *timeo);
 
+struct or_calltable;
+
 /* Networking protocol blocks we attach to sockets.
  * socket layer -> transport layer interface
  * transport -> network interface is defined by struct inet_proto
@@ -547,6 +549,8 @@
 	kmem_cache_t		*slab;
 	unsigned int		obj_size;
 
+	struct or_calltable	*rsk_prot;
+
 	struct module		*owner;
 
 	char			name[32];