--- rxtx-20100211.orig/src/SerialImp.c	2018-11-04 13:02:53.306800091 +0100
+++ rxtx-20100211.new/src/SerialImp.c	2018-11-04 13:01:39.495497644 +0100
@@ -148,6 +148,7 @@
 #endif /* LIBLOCKDEV */
 
 extern int errno;
+#include <sys/sysmacros.h>
 
 #include "SerialImp.h"