diff --git a/sys/netpfil/pf/pf.h b/sys/netpfil/pf/pf.h
--- a/sys/netpfil/pf/pf.h
+++ b/sys/netpfil/pf/pf.h
@@ -561,7 +561,10 @@
 #define	PFRULE_NOSYNC		0x0010
 #define PFRULE_SRCTRACK		0x0020  /* track source states */
 #define PFRULE_RULESRCTRACK	0x0040  /* per rule */
+
+#ifdef _KERNEL
 #define	PFRULE_REFS		0x0080	/* rule has references */
+#endif
 
 /* scrub flags */
 #define	PFRULE_NODF		0x0100