diff --git a/src/js/physicalDevelopment.js b/src/js/physicalDevelopment.js
index ef7db0d7eb2fcfb59f0121d93723a2f60dc9bee5..818228a3ba2d2776e2de8ac19dddb27174ebc651 100644
--- a/src/js/physicalDevelopment.js
+++ b/src/js/physicalDevelopment.js
@@ -14,7 +14,7 @@ globalThis.physicalDevelopment = (function physicalDevelopment() {
 	 * @param {App.Entity.SlaveState} slave
 	 */
 	function physicalDevelopment(slave) {
-		if (slave.geneticQuirks.pregeria === 2) {
+		if (slave.geneticQuirks.progeria === 2) {
 			// since progeria increases .physicalAge, we need to work around it.
 			// nothing other than the incubator drastically desyncs it, and progeria slaves do not live through incubation, so this should be fine.
 			physicalAgeSwap = slave.actualAge;