diff -r 1268a13ddcd2 -r 749e572f9378 src/network/core/tcp.cpp
--- a/src/network/core/tcp.cpp	Fri Apr 18 09:49:23 2008 +0000
+++ b/src/network/core/tcp.cpp	Fri Apr 18 10:16:51 2008 +0000
@@ -75,6 +75,7 @@
 	if (!_network_server && _networking) {
 		_switch_mode = SM_MENU;
 		_networking = false;
+		extern StringID _switch_mode_errorstr;
 		_switch_mode_errorstr = STR_NETWORK_ERR_LOSTCONNECTION;
 
 		return NETWORK_RECV_STATUS_CONN_LOST;