--- a/src/airport_gui.cpp	Tue Sep 30 17:50:21 2008 +0000
+++ b/src/airport_gui.cpp	Tue Sep 30 20:39:50 2008 +0000
@@ -146,7 +146,7 @@
 
 void ShowBuildAirToolbar()
 {
-	if (!IsValidPlayerID(_current_player)) return;
+	if (!IsValidCompanyID(_current_company)) return;
 
 	DeleteWindowByClass(WC_BUILD_TOOLBAR);
 	AllocateWindowDescFront<BuildAirToolbarWindow>(&_air_toolbar_desc, TRANSPORT_AIR);