diff -Nurp dnsmasq-2.80.orig/src/dnsmasq.h dnsmasq-2.80/src/dnsmasq.h --- dnsmasq-2.80.orig/src/dnsmasq.h 2018-10-18 21:21:55.000000000 +0300 +++ dnsmasq-2.80/src/dnsmasq.h 2019-12-13 02:10:37.798356042 +0200 @@ -138,6 +138,7 @@ typedef unsigned long long u64; #endif #if defined(HAVE_LINUX_NETWORK) +#include <linux/sockios.h> #include <linux/capability.h> /* There doesn't seem to be a universally-available userspace header for these. */