diff --git a/devTools/types/FC/arcology.d.ts b/devTools/types/FC/arcology.d.ts
index 75413f5f629bea4761baaa586d193a00185a45f4..43410b757c2fc9f1ccd74f30a0dfab45808c95c1 100644
--- a/devTools/types/FC/arcology.d.ts
+++ b/devTools/types/FC/arcology.d.ts
@@ -134,6 +134,7 @@ declare namespace FC {
 		FSDegradationistSMR: Bool;
 		FSBodyPuristLaw: number;
 		FSBodyPuristSMR: Bool;
+		FSBodyPuristCatLaw: Bool;
 		FSTransformationFetishistSMR: Bool;
 		FSYouthPreferentialistLaw: number;
 		FSYouthPreferentialistSMR: Bool;
diff --git a/src/data/backwardsCompatibility/backwardsCompatibility.js b/src/data/backwardsCompatibility/backwardsCompatibility.js
index 2b2376399eda084261093881a7758e7c7a28656c..af208c3af39a5e3cb963737fd460c5b677004527 100644
--- a/src/data/backwardsCompatibility/backwardsCompatibility.js
+++ b/src/data/backwardsCompatibility/backwardsCompatibility.js
@@ -968,6 +968,10 @@ App.Update.globalVariables = function(node) {
 				V.arcologies[0].FSStatuesqueGlorification = 10;
 				App.UI.DOM.appendNewElement("div", node, `Fixed NaN FS value for FSStatuesqueGlorification`);
 			}
+			// Cat Mod
+			if (V.arcologies[0].FSBodyPuristCatLaw === undefined) {
+				V.arcologies[0].FSBodyPuristCatLaw = 0;
+			}
 			// Clean up FS in player arcology
 			App.Update.FScheatDatatypeCleanup();
 		}
diff --git a/src/events/intro/initNationalities.js b/src/events/intro/initNationalities.js
index 01a9b2a69b2c37d7952afc0ad9de39268f6a276f..eead7190f1cbbffe26edb3123031233f88636892 100644
--- a/src/events/intro/initNationalities.js
+++ b/src/events/intro/initNationalities.js
@@ -448,6 +448,7 @@ App.Intro.initNationalities = function() {
 		V.arcologies[0].FSDegradationistSMR = 0;
 		V.arcologies[0].FSBodyPuristLaw = 0;
 		V.arcologies[0].FSBodyPuristSMR = 0;
+		V.arcologies[0].FSBodyPuristCatLaw = 0;
 		V.arcologies[0].FSTransformationFetishistSMR = 0;
 		V.arcologies[0].FSYouthPreferentialistLaw = 0;
 		V.arcologies[0].FSYouthPreferentialistSMR = 0;