--- a/src/ai/default/default.cpp	Sun Jul 22 22:28:46 2007 +0000
+++ b/src/ai/default/default.cpp	Mon Jul 23 22:20:36 2007 +0000
@@ -3409,7 +3409,7 @@
 
 	for (; p->mode == 0; p++) {
 		TileIndex tile2 = TILE_ADD(tile, ToTileIndexDiff(p->tileoffs));
-		const AirportFTAClass* airport = GetAirport(p->attr);
+		AirportFTAClass* airport = GetAirport(p->attr);
 		uint w = airport->size_x;
 		uint h = airport->size_y;
 		uint rad = _patches.modified_catchment ? airport->catchment : 4;