diff --git a/src/js/SlaveState.js b/src/js/SlaveState.js
index 375ade073c885da5c07a250966fc563a83f639db..11531fc0a6a909da393ef2ab394205e9743a20c2 100644
--- a/src/js/SlaveState.js
+++ b/src/js/SlaveState.js
@@ -1930,13 +1930,13 @@ App.Entity.SlaveState = class SlaveState {
 		/** Has the slave gone through female puberty.
 		 *
 		 * 0: no; 1: yes */
-		//this.pubertyXX = 0;
+		this.pubertyXX = undefined;
 		/** Target .physicalAge for male puberty to occur. */
 		this.pubertyAgeXY = 13;
 		/** Has the slave gone through male puberty.
 		 *
 		 * 0: no; 1: yes */
-		//this.pubertyXY = 0;
+		this.pubertyXY = undefined;
 		/**
 		 * not fully implemented.
 		 * * 0: no scars