WhatsApp backup - google Drive backup settings missing with min req fulfilled, what do I do?

[AC Question]

WhatsApp backup - google Drive backup settings missing with min req fulfilled

Hi,

According to the whatsapp faq, you can configuring your Google Drive backup settings, by going to

Open WhatsApp.
Go to Menu Button > Settings > Chats and calls > Chat backup.
Tap on Back up to Google Drive.
Set the backup frequency to your liking.

However under Chats and calls the option I see is Backup chats :-(

I have all the minimum requirements, with Lollipop on my phone, plenty of space, a google account and google play services installed.

Any advice appreciated.

 

[boardtc]

Today I went into WhatsApp and I was prompted to backup to google drive! There is now an option in my settings. Not sure how this happened all of a sudden! I have 2.12.367. It does not appear to have been recently updated on my phone