--- a/kexec/ifdown.c
+++ b/kexec/ifdown.c
@@ -14,7 +14,7 @@
 #include <sys/ioctl.h>
 #include <sys/socket.h>
 #include <sys/time.h>
-#include <sys/errno.h>
+#include <errno.h>
 
 #include <net/if.h>
 #include <netinet/in.h>
