Can not make image for linksys_wrt1900ac(mwlwifi-firmware-88w8864 miss)

One month ago, I make a image for linksys_wrt1900ac success,
But now, i issue the command and then get error

make image PROFILE=linksys_wrt1900ac
Collected errors:
 * opkg_install_cmd: Cannot install package mwlwifi-firmware-88w8864.
make[2]: *** [Makefile:158: package_install] Error 255

i suppose the was incomplete

What can i do?

Thank you