diff --git a/sys/dev/ixgbe/if_ixv.c b/sys/dev/ixgbe/if_ixv.c
--- a/sys/dev/ixgbe/if_ixv.c
+++ b/sys/dev/ixgbe/if_ixv.c
@@ -1373,11 +1373,13 @@
 	struct ixgbe_softc *sc = iflib_get_softc(ctx);
 	if_softc_ctx_t     scctx;
 	struct ixgbe_hw    *hw = &sc->hw;
+#ifdef DEV_NETMAP
 	if_t               ifp = iflib_get_ifp(ctx);
+#endif
 	struct ix_rx_queue *que = sc->rx_queues;
 	u32                bufsz, psrtype;
 
-	if (if_getmtu(ifp) > ETHERMTU)
+	if (sc->rx_mbuf_sz > 2048)
 		bufsz = 4096 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
 	else
 		bufsz = 2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;