[NTG-context] uppercase section titles: no line breaking?

Hi again, I’m trying to get uppercase titles with \WORD, but they aren’t broken into lines; while \WORD works in normal text. What’s the matter? Best, Hraban %%%%% \define[2]\MyChapter{ \WORD{#2} } \setuphead[chapter][ command=\MyChapter ] \starttext \chapter{ \input tufte } \WORD{ \input knuth } \stoptext %%%%%