diff --git a/src/data/backwardsCompatibility/updateSlaveObject.js b/src/data/backwardsCompatibility/updateSlaveObject.js
index 6c98695e4ce036159e9337c18e60012e1ea593e2..cfcc1b8726d631619c5623c69e6d1846d882c8eb 100644
--- a/src/data/backwardsCompatibility/updateSlaveObject.js
+++ b/src/data/backwardsCompatibility/updateSlaveObject.js
@@ -63,7 +63,7 @@ App.Update.Slave = function(slave) {
 		}
 	}
 	if (slave.genetics === undefined) { slave.genetics = {}; }
-	if (slave.geneMods === undefined) { geneMods = {NCS: 0, rapidCellGrowth: 0}; }
+	if (slave.geneMods === undefined) { slave.geneMods = {NCS: 0, rapidCellGrowth: 0}; }
 	if (slave.inducedNCS !== undefined) {
 		slave.geneMods.NCS = slave.inducedNCS;
 		delete slave.inducedNCS;