diff --git a/src/network/core/tcp_game.cpp b/src/network/core/tcp_game.cpp
--- a/src/network/core/tcp_game.cpp
+++ b/src/network/core/tcp_game.cpp
@@ -45,6 +45,8 @@ NetworkRecvStatus NetworkGameSocketHandl
 {
 	/* Clients drop back to the main menu */
 	if (!_network_server && _networking) {
+		extern void ClientNetworkEmergencySave(); // from network_client.cpp
+		ClientNetworkEmergencySave();
 		_switch_mode = SM_MENU;
 		_networking = false;
 		ShowErrorMessage(STR_NETWORK_ERROR_LOSTCONNECTION, INVALID_STRING_ID, WL_CRITICAL);