Fill engine oil

[zeppo]

So my car came up with this message the other day telling me to top up the engine oil. Max 1l. I did a dipstick and filed it 0.75l. The message did not go away. I then topped it to max with the full 1l. of the bottle, but the message still consistently appears every time i turn on the car and the little yellow triangle is on as well.
Does anyone know how to reset this message?

 

[KoNG]

I had same message on my etsi 1.5, topped up 600ml to full. And message disappeared.

 

[zeppo]

Well, i found it by random, but in case anyone has some problems with this:
Start engine (This is the thing that i didn't do the first many many times, because why would i turn on the engine to refill engine oil?)
Open the bonnet
Close the bonnet