diff --git a/sys/dev/mxge/if_mxge.c b/sys/dev/mxge/if_mxge.c
index d8551ddc8642..d68f27eb2cc4 100644
--- a/sys/dev/mxge/if_mxge.c
+++ b/sys/dev/mxge/if_mxge.c
@@ -4984,6 +4984,9 @@ mxge_attach(device_t dev)
 	ifp->if_ioctl = mxge_ioctl;
 	ifp->if_start = mxge_start;
 	ifp->if_get_counter = mxge_get_counter;
+	ifp->if_hw_tsomax = 65536 - (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN);
+	ifp->if_hw_tsomaxsegcount = sc->ss[0].tx.max_desc;
+	ifp->if_hw_tsomaxsegsize = 65536;
 	/* Initialise the ifmedia structure */
 	ifmedia_init(&sc->media, 0, mxge_media_change,
 		     mxge_media_status);