Made a mistake on application!

[eduu_u]

Hello everyone

I had my biometrics appointment yesterday, however it wasn't until today that I checked the copies of my personal detail information and realized that I made a (serious or not too serious?) mistake.

My date of birth is 21st of December, my mistake was to write 12th of December. However, my passport and birth certificate, both in UKBA hands, are evidence that I made had an error.

I'm worried about this. have any of you know about some case like this?. Are there any chances that my visa is rejected?

Thank you in advance

Best