diff --git a/include/net/ip.h b/include/net/ip.h
index cbeb97d..6850a80 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -177,6 +177,8 @@
 extern int sysctl_ip_default_ttl;
 extern int sysctl_ip_nonlocal_bind;
 
+extern struct ctl_path net_ipv4_ctl_path[];
+
 /* From ip_fragment.c */
 struct inet_frags_ctl;
 extern struct inet_frags_ctl ip4_frags_ctl;