linux-atm ftbfs in disco

/bin/bash ../../libtool --tag=CC --mode=link gcc -I../../src/include -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -fno-strict-aliasing -Wall -Wshadow -Wpointer-arith -Wwrite-strings -Wstrict-prototypes -Wl,-Bsymbolic-functions -Wl,-z,relro -o atmarp atmarp.o ../../src/lib/libatm.la
libtool: link: gcc -I../../src/include -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -fno-strict-aliasing -Wall -Wshadow -Wpointer-arith -Wwrite-strings -Wstrict-prototypes -Wl,-Bsymbolic-functions -Wl,-z -Wl,relro -o .libs/atmarp atmarp.o ../../src/lib/.libs/libatm.so
gcc -DHAVE_CONFIG_H -I. -I../.. -Wdate-time -D_FORTIFY_SOURCE=2 -I../../src/include -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -fno-strict-aliasing -Wall -Wshadow -Wpointer-arith -Wwrite-strings -Wstrict-prototypes -MT atmarpd.o -MD -MP -MF .deps/atmarpd.Tpo -c -o atmarpd.o atmarpd.c
mv -f .deps/atmarpd.Tpo .deps/atmarpd.Po
gcc -DHAVE_CONFIG_H -I. -I../.. -Wdate-time -D_FORTIFY_SOURCE=2 -I../../src/include -g -O2 -fdebug-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -fno-strict-aliasing -Wall -Wshadow -Wpointer-arith -Wwrite-strings -Wstrict-prototypes -MT arp.o -MD -MP -MF .deps/arp.Tpo -c -o arp.o arp.c
In file included from arp.c:20:
/usr/include/linux/if_arp.h:121:16: error: ‘IFNAMSIZ’ undeclared here (not in a function)
  char arp_dev[IFNAMSIZ];
                ^~~~~~~~
make[4]: *** [Makefile:470: arp.o] Error 1
make[4]: Leaving directory '/<<PKGBUILDDIR>>/src/arpd'
make[3]: *** [Makefile:366: all-recursive] Error 1