Doesn't Compile on Ubuntu 16.04

[pepa65]

make[1]: Entering directory '/usr/src/linux-headers-4.4.0-42-generic'
LD /home/andrew/git/mt7601u/built-in.o
CC [M] /home/andrew/git/mt7601u/usb.o
CC [M] /home/andrew/git/mt7601u/init.o
CC [M] /home/andrew/git/mt7601u/main.o
/home/andrew/git/mt7601u/main.c:415:18: error: initialization from incompatible pointer type [-Werror=incompatible-pointer-types]
.ampdu_action = mt76_ampdu_action,
^
/home/andrew/git/mt7601u/main.c:415:18: note: (near initialization for ‘mt7601u_ops.ampdu_action’)
cc1: all warnings being treated as errors
scripts/Makefile.build:258: recipe for target '/home/andrew/git/mt7601u/main.o' failed
make[2]: *** [/home/andrew/git/mt7601u/main.o] Error 1
Makefile:1403: recipe for target 'module/home/andrew/git/mt7601u' failed
make[1]: *** [module/home/andrew/git/mt7601u] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-4.4.0-42-generic'
Makefile:8: recipe for target 'default' failed
make: *** [default] Error 2