[XeTeX] bidi: LTR header in RTL document

[Talal Al-Azem]

Hello. I have a section of a chapter, the text of which is RTL. However, to keep the headers uniform with the rest of the chapter, I want its header to be LTR. How do I do this in Bidi?

I tried doing \section{\LTR{header title}}, but the result I got had the section numbering still RTL:
header title 2.1

instead of: 
2.1 header title

Any help would be appreciated.

Kind regards,
Talal