1diff --git a/mono/io-layer/processes.c b/mono/io-layer/processes.c
2index 53c271a4..84bd3252 100644
3--- a/mono/io-layer/processes.c
4+++ b/mono/io-layer/processes.c
5@@ -19,6 +19,7 @@
6 #include <errno.h>
7 #include <sys/types.h>
8 #include <sys/stat.h>
9+#include <sys/sysmacros.h>
10 #include <unistd.h>
11 #ifdef HAVE_SIGNAL_H
12 #include <signal.h>