[NTG-context] Missing °C symbol in math mode with dejavu font

Hi all, The °C symbol is missing in math mode with the dejavu font. I thought that this should be handled by using the '°' + 'C' symbols instead but it is not the case. Is that a bug? What can I do to get the °C symbol with this font? %% MWE \setupbodyfont[dejavu] \starttext Temperature : \unit{100 celsius} works.\par Temperature : \m{\unit{100 celsius}} doesn't work. \stoptext -- Romain Diss