--- a/src/clear_cmd.cpp	Tue Dec 25 18:25:25 2007 +0000
+++ b/src/clear_cmd.cpp	Tue Dec 25 23:42:52 2007 +0000
@@ -24,6 +24,7 @@
 #include "tile_cmd.h"
 #include "vehicle.h"
 #include "functions.h"
+#include "economy_func.h"
 
 /*
  * In one terraforming command all four corners of a initial tile can be raised/lowered (though this is not available to the player).