--- src/wfs_util.c.orig	2018-01-02 15:27:53.000000000 -0500
+++ src/wfs_util.c	2019-08-04 19:53:05.301455493 -0400
@@ -123,6 +123,7 @@
 #ifdef HAVE_SYS_TYPES_H
 # include <sys/types.h>	/* for open() */
 #endif
+#include <sys/sysmacros.h>
 
 #ifdef HAVE_SYS_STAT_H
 # include <sys/stat.h>