--- dnsmasq-2.78/src/dnsmasq.h	2017-10-02 15:13:51.000000000 +0200
+++ src/src/dnsmasq.h	2019-08-02 17:25:11.573006994 +0200
@@ -129,6 +129,7 @@
 
 #if defined(HAVE_LINUX_NETWORK)
 #include <linux/capability.h>
+#include <linux/sockios.h>
 /* There doesn't seem to be a universally-available 
    userspace header for these. */