diff --git a/src/data/backwardsCompatibility/updateSlaveObject.js b/src/data/backwardsCompatibility/updateSlaveObject.js
index 9cd184f6c4f32357e04dc4d75fa799aa9261ba6d..1041ad1d7c7568468c27841d6868b50a20a151f7 100644
--- a/src/data/backwardsCompatibility/updateSlaveObject.js
+++ b/src/data/backwardsCompatibility/updateSlaveObject.js
@@ -2,6 +2,9 @@ App.Update.Slave = function(slave, genepool = false) {
 	slave.geneticQuirks = Object.assign({
 		macromastia: 0, gigantomastia: 0, fertility: 0, hyperFertility: 0, superfetation: 0, gigantism: 0, dwarfism: 0, pFace: 0, uFace: 0, albinism: 0, heterochromia: 0, rearLipedema: 0, wellHung: 0, wGain: 0, wLoss: 0, mGain: 0, mLoss: 0, androgyny: 0, girlsOnly: 0
 	}, slave.geneticQuirks);
+	slave.advancedGeneticModifications = Object.assign({
+		uterineHypersensitivity: 0
+	}, slave.advancedGeneticModifications);
 	if (genepool) {
 		slave.womb = [];
 	} else {