Index: src/tunnelbridge_cmd.cpp
===================================================================
--- src/tunnelbridge_cmd.cpp	(revision 8659)
+++ src/tunnelbridge_cmd.cpp	(working copy)
@@ -421,7 +421,7 @@
 	 * It's unnecessary to execute this command every time for every bridge. So it is done only
 	 * and cost is computed in "bridge_gui.c". For AI, Towns this has to be of course calculated
 	 */
-	if (!(flags & DC_QUERY_COST)) {
+	if (!(flags & DC_QUERY_COST) || (IsValidPlayer(_current_player) && GetPlayer(_current_player)->is_ai)) {
 		const Bridge *b = &_bridge[bridge_type];
 
 		bridge_len += 2; // begin and end tiles/ramps