diff --git a/src/network/network_func.h b/src/network/network_func.h
--- a/src/network/network_func.h
+++ b/src/network/network_func.h
@@ -59,6 +59,7 @@ void NetworkClientSendRcon(const std::st
 void NetworkClientSendChat(NetworkAction action, DestType type, int dest, const std::string &msg, int64 data = 0);
 bool NetworkClientPreferTeamChat(const NetworkClientInfo *cio);
 bool NetworkCompanyIsPassworded(CompanyID company_id);
+uint NetworkMaxCompaniesAllowed();
 bool NetworkMaxCompaniesReached();
 void NetworkPrintClients();
 void NetworkHandlePauseChange(PauseMode prev_mode, PauseMode changed_mode);