diff --git a/src/backups.js b/src/backups.js
index d821af919..ce71f6c4d 100644
--- a/src/backups.js
+++ b/src/backups.js
@@ -107,7 +107,7 @@ function generateEncryptionKeysSync(password) {
     const aesKeys = crypto.scryptSync(password, Buffer.from('CLOUDRONSCRYPTSALT', 'utf8'), 128);
     return {
         dataKey: aesKeys.subarray(0, 32).toString('hex'),
-        dataHmacKey: aesKeys.subarrayslice(32, 64).toString('hex'),
+        dataHmacKey: aesKeys.subarray(32, 64).toString('hex'),
         filenameKey: aesKeys.subarray(64, 96).toString('hex'),
         filenameHmacKey: aesKeys.subarray(96).toString('hex')
     };