diff -up rxtx-2.2pre2/src/SerialImp.c.orig rxtx-2.2pre2/src/SerialImp.c
--- rxtx-2.2pre2/src/SerialImp.c.orig 2024-03-07 15:23:09.969976021 +0100
+++ rxtx-2.2pre2/src/SerialImp.c      2024-03-07 15:25:10.089430040 +0100
@@ -148,6 +148,7 @@
 #endif /* LIBLOCKDEV */
 
 extern int errno;
+#include <sys/sysmacros.h>
 
 #include "SerialImp.h"