diff --git a/network.h b/network.h
--- a/network.h
+++ b/network.h
@@ -206,7 +206,7 @@ VARDEF bool _network_autoclean_companies
 VARDEF uint8 _network_autoclean_unprotected; // Remove a company after X months
 VARDEF uint8 _network_autoclean_protected;   // Unprotect a company after X months
 
-VARDEF uint16 _network_restart_game_year;    // If this year is reached, the server automaticly restarts
+VARDEF Year _network_restart_game_year;      // If this year is reached, the server automaticly restarts
 
 NetworkGameList *NetworkQueryServer(const char* host, unsigned short port, bool game_info);