Index: sys/net/flowtable.c
===================================================================
--- sys/net/flowtable.c	(revision 261788)
+++ sys/net/flowtable.c	(working copy)
@@ -1069,6 +1069,15 @@
 		RTFREE(rt);
 		return (NULL);
 	}
+
+	/* Don't insert the entry if the ARP hasn't yet finished resolving */
+	if ((lle->la_flags & LLE_VALID) == 0) {
+		RTFREE(rt);
+		LLE_FREE(lle);
+		FLOWSTAT_INC(ft, ft_fail_lle_invalid);
+		return (NULL);
+	}
+
 	ro->ro_lle = lle;
 
 	if (flowtable_insert(ft, hash, key, fibnum, ro, flags) != 0) {
Index: sys/net/flowtable.h
===================================================================
--- sys/net/flowtable.h	(revision 261788)
+++ sys/net/flowtable.h	(working copy)
@@ -39,6 +39,7 @@
 	uint64_t	ft_frees;
 	uint64_t	ft_hits;
 	uint64_t	ft_lookups;
+	uint64_t	ft_fail_lle_invalid;
 };
 
 #ifdef	_KERNEL
Index: usr.bin/netstat/flowtable.c
===================================================================
--- usr.bin/netstat/flowtable.c	(revision 261788)
+++ usr.bin/netstat/flowtable.c	(working copy)
@@ -55,6 +55,7 @@
 	p(ft_collisions, "\t%ju collision%s\n");
 	p(ft_free_checks, "\t%ju free check%s\n");
 	p(ft_frees, "\t%ju free%s\n");
+	p(ft_fail_lle_invalid, "\t%ju lookups w/ no resolved ARP%s\n");
 
 #undef	p2
 #undef	p