diff --git a/src/economy.cpp b/src/economy.cpp
--- a/src/economy.cpp
+++ b/src/economy.cpp
@@ -746,11 +746,11 @@ void StartupEconomy()
 		/* Apply difficulty settings */
 		uint mod = 1;
 		switch (_price_base_specs[i].category) {
-			case PC_RUNNING:
+			case PCAT_RUNNING:
 				mod = _settings_game.difficulty.vehicle_costs;
 				break;
 
-			case PC_CONSTRUCTION:
+			case PCAT_CONSTRUCTION:
 				mod = _settings_game.difficulty.construction_cost;
 				break;