diff --git a/usr.bin/fstat/Makefile b/usr.bin/fstat/Makefile
index 1be1d7f7a545..8ca57b992bc8 100644
--- a/usr.bin/fstat/Makefile
+++ b/usr.bin/fstat/Makefile
@@ -9,4 +9,6 @@ BINGRP=	kmem
 BINMODE=2555
 WARNS?=	6
 
+CFLAGS+=-D_KVM_VNODE
+
 .include <bsd.prog.mk>