need room for fall

[Lewis Overton]

I have this fragment:

    f2~f8 \bendAfter #-4 f |
    r2 r8 c d f~ |

which produces a "fall" in jazz idiom. 

EXCEPT the fall ends at the bar line, resulting in a short, near-vertical line.

I need either for the fall to cross the bar line into the next measure, or
to somehow add space between the last note and the bar line.

Any ideas?

Lewy