[O] avoid subscripting text

[Luca Ferrari]

Hi all,
in my file I've got some text that I'd like to be represented as fixed
font size, and therefore I write it as ~cap_mkdb~ surrounding with ~.
The problem is that, when I export the document to ODF, I got the word
following the underscore written as a subscript. Now this reminds me
the LaTeX behavior, and when I export it happens to me that LaTeX is
used for a preliminary conversion.
Is there a smart way to avoid escaping any underscore?

Thanks,
Luca