diff --git a/src/data/backwardsCompatibility/backwardsCompatibility.js b/src/data/backwardsCompatibility/backwardsCompatibility.js
index efa1b52568f4490c266364d20a246ef08b55e79d..27dc25d16f406938fe63327c79c695c54f660dce 100644
--- a/src/data/backwardsCompatibility/backwardsCompatibility.js
+++ b/src/data/backwardsCompatibility/backwardsCompatibility.js
@@ -1150,12 +1150,12 @@ App.Update.genePoolRecords = function() {
 			let oldEyes;
 			if (slave.origEye === "implant") {
 				slave.eyesImplant = 1;
-				oldEyes = V.genePool.find(function(s) { return s.ID = slave.ID; });
+				oldEyes = V.genePool.find(function(s) { return s.ID === slave.ID; });
 				slave.origEye = oldEyes.origEye;
 			}
 			if (slave.origEye === "none") {
 				slave.eyes = -3;
-				oldEyes = V.genePool.find(function(s) { return s.ID = slave.ID; });
+				oldEyes = V.genePool.find(function(s) { return s.ID === slave.ID; });
 				slave.origEye = oldEyes.origEye;
 			}
 			if (slave.eyeColor === "empty") {