--- sys/dev/vmware/vmxnet3/if_vmx.c.orig
+++ sys/dev/vmware/vmxnet3/if_vmx.c
@@ -1320,7 +1320,7 @@
 	hdrlen = pi->ipi_ehdrlen + pi->ipi_ip_hlen;
 	if (pi->ipi_csum_flags & CSUM_TSO) {
 		sop->offload_mode = VMXNET3_OM_TSO;
-		sop->hlen = hdrlen;
+		sop->hlen = hdrlen + pi->ipi_tcp_hlen;
 		sop->offload_pos = pi->ipi_tso_segsz;
 	} else if (pi->ipi_csum_flags & (VMXNET3_CSUM_OFFLOAD |
 	    VMXNET3_CSUM_OFFLOAD_IPV6)) {