MIRO - default value for currency parameter (waers)

Hi everyone,

I need to establish 'EUR' as a default value in transaction MIRO. I've tried already changing the value in SU02 but it doesn't work. I've tried the badi MRM_HEADER_DEFAULT but asks for a password when I try to modify it so that's out too.

Is there any way I can establish 'EUR' as default currency? any leads will be appreciated, thank you very much in advance.

Zigor.