diff -Naur a/cngpijmon/cnijnpr/cnijnpr/cnijnpr.c b/cngpijmon/cnijnpr/cnijnpr/cnijnpr.c
--- a/cngpijmon/cnijnpr/cnijnpr/cnijnpr.c	2021-10-18 14:36:56.794504642 +0300
+++ b/cngpijmon/cnijnpr/cnijnpr/cnijnpr.c	2021-10-18 14:31:39.904508312 +0300
@@ -33,7 +33,7 @@
 #include <signal.h>
 #include <sys/ioctl.h>
 #include <net/if.h>
-#include <sys/sysctl.h>
+#include <unistd.h>
 #include <config.h>
 
 #include <dlfcn.h>