diff --git a/src/js/economyJS.tw b/src/js/economyJS.tw
index 97d6e8d4fb820d2946cc571607e0925b099e285d..50fe85f731b1583c21a31bf8f1d0299216223119 100644
--- a/src/js/economyJS.tw
+++ b/src/js/economyJS.tw
@@ -181,7 +181,7 @@ window.getCost = function(array) {
 			if(slave.assignment === Job.SERVANT) {
 				costs -= rulesCost;
 			}
-			if(setup.servantCareers.includes(slave.career) || slave.skillS >= $masteredXP) {
+			if(setup.servantCareers.includes(slave.career) || slave.skillS >= State.variables.masteredXP) {
 				costs -= rulesCost;
 			}
 		}