Do I need to file a 1040x to add a foreign bank account ( forget to file on Form 8939) (no interest 2017)(already report 5 accounts I have)if need, file now or next year?

I just mailed my 2017 tax return after finished by TurboTax. I reported my 5 foreign financial accounts and assets on Form 8938. I start preparing my FinCEN Form 114, but I notice that I forget to report one foreign bank account with $1270 deposit but no interest in 2017 to IRS. The account has been closed in Feb this year. Do I need to file a 1040X to add this account? If so, when do I need to file? Immediately or wait for next year tax return time?