--- a/unmovable_cmd.c	Fri Oct 07 20:53:21 2005 +0000
+++ b/unmovable_cmd.c	Mon Oct 10 10:36:37 2005 +0000
@@ -389,7 +389,7 @@
 {
 	if (!IsTileOwner(tile, old_player)) return;
 
-	if (_m[tile].m5==3 && new_player != 255) {
+	if (_m[tile].m5 == 3 && new_player != OWNER_SPECTATOR) {
 		SetTileOwner(tile, new_player);
 	} else {
 		DoClearSquare(tile);