diff -ruN cluster-3.2.0.orig/dlm/libdlm/libdlm.c cluster-3.2.0/dlm/libdlm/libdlm.c
--- cluster-3.2.0.orig/dlm/libdlm/libdlm.c	2012-11-26 05:13:22.000000000 +0100
+++ cluster-3.2.0/dlm/libdlm/libdlm.c	2018-04-29 23:46:57.591160008 +0200
@@ -5,6 +5,7 @@
 #include <sys/ioctl.h>
 #include <sys/param.h>
 #include <sys/stat.h>
+#include <sys/sysmacros.h>
 #include <stdint.h>
 #include <stdlib.h>
 #include <inttypes.h>