diff --git a/App/AppStore/ISStoreAccount.swift b/App/AppStore/ISStoreAccount.swift
index 9f0ce6c..7cf0fa5 100644
--- a/App/AppStore/ISStoreAccount.swift
+++ b/App/AppStore/ISStoreAccount.swift
@@ -19,7 +19,7 @@ extension ISStoreAccount {
         guard let username = username, let password = password else { fatalError() }
 
         var account: ISStoreAccount? = nil
-        var error: MASError? = nil
+        let error: MASError? = nil
 
         let accountService: ISAccountService = ISServiceProxy.genericShared().accountService
         let client = ISStoreClient(storeClientType: 0)