diff --git a/sysdeps/freebsd/glibtop_machine.h b/sysdeps/freebsd/glibtop_machine.h
index 84a45ab7..c6b63980 100644
--- a/sysdeps/freebsd/glibtop_machine.h
+++ b/sysdeps/freebsd/glibtop_machine.h
@@ -22,6 +22,7 @@
 #ifndef __GLIBTOP_MACHINE_H__
 #define __GLIBTOP_MACHINE_H__
 
+#include <sys/param.h>
 #include <nlist.h>
 #include <kvm.h>
 #include <sys/dkstat.h>