diff --git a/CookieMonster.js b/CookieMonster.js
index ba4675f..9ab5461 100644
--- a/CookieMonster.js
+++ b/CookieMonster.js
@@ -2017,7 +2017,7 @@ CM.ReplaceNative = function() {
 	Game.RebuildUpgrades = function() {
 		CM.Backup.RebuildUpgrades();
 		CM.Disp.AddTooltipUpgrade();
-		CM.Sim.DoSims = 1;
+		Game.recalculateGains = 1;
 	}
 	
 	CM.Backup.UpdateMenu = Game.UpdateMenu;
diff --git a/src/Main.js b/src/Main.js
index 15de2c2..d3c593d 100644
--- a/src/Main.js
+++ b/src/Main.js
@@ -41,7 +41,7 @@ CM.ReplaceNative = function() {
 	Game.RebuildUpgrades = function() {
 		CM.Backup.RebuildUpgrades();
 		CM.Disp.AddTooltipUpgrade();
-		CM.Sim.DoSims = 1;
+		Game.recalculateGains = 1;
 	}
 	
 	CM.Backup.UpdateMenu = Game.UpdateMenu;