diff --git a/network.c b/network.c
--- a/network.c
+++ b/network.c
@@ -1360,6 +1360,20 @@ void NetworkShutDown(void)
 	#endif
 }
 
+void NetworkChangeCompanyPassword(const char *str)
+{
+	if (strncmp(str, "*", sizeof(_network_player_info[_local_player].password)) == 0) {
+		_network_player_info[_local_player].password[0] = '\0';
+		IConsolePrint(_iconsole_color_warning, "Company password protection removed.");
+	} else {
+		ttd_strlcpy(_network_player_info[_local_player].password, str, sizeof(_network_player_info[_local_player].password));
+		IConsolePrintF(_iconsole_color_warning, "Company protected with password '%s'.", _network_player_info[_local_player].password);
+	}
+
+	if (!_network_server)
+		SEND_COMMAND(PACKET_CLIENT_SET_PASSWORD)(_network_player_info[_local_player].password);
+}
+
 #else
 
 void ParseConnectionString(const byte **player, const byte **port, byte *connection_string) {}