diff --git a/include/net.h b/include/net.h
index e3889a0..c06b577 100644
--- a/include/net.h
+++ b/include/net.h
@@ -536,7 +536,9 @@
 #endif
 extern char	net_nis_domain[32];	/* Our IS domain */
 extern char	net_hostname[32];	/* Our hostname */
-extern char	net_root_path[64];	/* Our root path */
+#ifdef CONFIG_NET
+extern char	net_root_path[CONFIG_BOOTP_MAX_ROOT_PATH_LEN];	/* Our root path */
+#endif
 /** END OF BOOTP EXTENTIONS **/
 extern u8		net_ethaddr[ARP_HLEN];		/* Our ethernet address */
 extern u8		net_server_ethaddr[ARP_HLEN];	/* Boot server enet address */