diff -uNr srelay-0.4.8p1/main.c srelay-0.4.8p1.mod/main.c
--- srelay-0.4.8p1/main.c	2017-12-25 05:10:37.000000000 +0200
+++ srelay-0.4.8p1.mod/main.c	2018-06-26 00:55:42.539288734 +0300
@@ -33,6 +33,7 @@
 */
 
 #include <sys/stat.h>
+#include <asm/ioctls.h>
 #include "srelay.h"
 
 /* prototypes */