Leonardo changes name of lpm megafunction

Hey,

I'm trying to create a 20-bit pipelined adder using the lpm_add_sub
megafunction, but when I try and compile my project in leonardo it
changes the name in the .edf file from lpm_add_sub to
lpm_add_sub_20_add_no_5 which Altera Max+PLUS does not recognize. In
order for it to place and route correctly, I have to manually change
the name back to lpm_add_sub. Does anybody know if there is a way to
prevent this from happening. I've already tried setting the noopt and
dont_touch attribute in the architecture block.

Thanks in Advance,
Jared Holzman