tomic_readandclear_32(&sc->iov_pending);
 	atomic_readandclear_32(&sc->iov_spoof_pending);
 	atomic_readandclear_32(&sc->iov_blocked_pending);
+	atomic_readandclear_32(&sc->iov_intr_drain_pending);
 	atomic_store_rel_32(&sc->iov_teardown, 0);
 }
 
diff --git a/sys/dev/e1000/if_igb_iov.h b/sys/dev/e1000/if_igb_iov.h
index f24b3199867e..8bd576d47649 100644
--- a/sys/dev/e1000/if_igb_iov.h
+++ b/sys/dev/e1000/if_igb_iov.h
@@ -31,6 +31,7 @@ void	igb_iov_mdd_event(struct e1000_softc *);
 void	igb_iov_ping_all_vfs(struct e1000_softc *);
 void	igb_iov_reset_prepare(struct e1000_softc *);
 u32	igb_iov_intr_mask(const struct e1000_softc *);
+void	igb_iov_intr_drain_stale(struct e1000_softc *);
 void	igb_iov_rebuild_mta(struct e1000_softc *);
 void	igb_iov_rebuild_vlan(struct e1000_softc *);
 void	igb_iov_update_pf_vmolr(struct e1000_softc *);
@@ -48,6 +49,7 @@ void	igb_iov_update_pf_vmolr(struct e1000_softc *);
 #define	igb_iov_ping_all_vfs(_sc)
 #define	igb_iov_reset_prepare(_sc)
 #define	igb_iov_intr_mask(_sc)			(0)
+#define	igb_iov_intr_drain_stale(_sc)		((void)(_sc))
 #define	igb_iov_rebuild_mta(_sc)
 #define	igb_iov_rebuild_vlan(_sc)
 #define	igb_iov_update_pf_vmolr(_sc)