And the days was

Although the פרק recounting the generations from אדם to נח seems somewhat repetitive, I noticed an interesting discrepancy this year. For most, the grand tally of their years lived begins ...ויהיו כל ימי. However, for חנוך it says ה:כ"ג ויהי כל ימי חנוך. I first thought the change might be related to חנוך's early exit. But the same wording is found later for למך as well. I have to admit, I haven't looked very hard to see if this is addressed anywhere. Any ideas?