--- a/network_gui.c	Mon Dec 20 16:02:01 2004 +0000
+++ b/network_gui.c	Mon Dec 20 16:15:19 2004 +0000
@@ -643,6 +643,10 @@
 
 		if (_network_lobby_company_count == MAX_PLAYERS)
 			w->disabled_state |= (1<<8);
+		/* You can not join a server as spectator when it has no companies active..
+		     it causes some nasty crashes */
+		if (_network_lobby_company_count == 0)
+			w->disabled_state |= (1<<9);
 
 		DrawWindowWidgets(w);