--- brltty-5.5/Programs/brlapi_client.c~	2017-04-19 00:35:13.000000000 +0200
+++ brltty-5.5/Programs/brlapi_client.c	2019-04-15 13:46:45.074072750 +0200
@@ -28,6 +28,7 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <sys/stat.h>
+#include <sys/sysmacros.h>
 #include <locale.h>
 
 #ifndef __MINGW32__