--- a/include/sigar.h
+++ b/include/sigar.h
@@ -110,6 +110,7 @@
 typedef unsigned long sigar_gid_t;
 #else
 #include <sys/types.h>
+#include <sys/sysmacros.h>
 typedef pid_t sigar_pid_t;
 typedef uid_t sigar_uid_t;
 typedef gid_t sigar_gid_t;