diff --git a/include/net/ip.h b/include/net/ip.h
index abf2820..3af3ed9 100644
--- a/include/net/ip.h
+++ b/include/net/ip.h
@@ -171,7 +171,8 @@
 extern int snmp_mib_init(void *ptr[2], size_t mibsize, size_t mibalign);
 extern void snmp_mib_free(void *ptr[2]);
 
-extern int sysctl_local_port_range[2];
+extern void inet_get_local_port_range(int *low, int *high);
+
 extern int sysctl_ip_default_ttl;
 extern int sysctl_ip_nonlocal_bind;