diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
index f5a4d8f4fd114..c1cd1c97f09dd 100644
--- a/drivers/net/ethernet/sfc/ef10.c
+++ b/drivers/net/ethernet/sfc/ef10.c
@@ -2256,7 +2256,7 @@ int efx_ef10_tx_tso_desc(struct efx_tx_queue *tx_queue, struct sk_buff *skb,
 	 * guaranteed to satisfy the second as we only attempt TSO if
 	 * inner_network_header <= 208.
 	 */
-	ip_tot_len = -EFX_TSO2_MAX_HDRLEN;
+	ip_tot_len = 0x10000 - EFX_TSO2_MAX_HDRLEN;
 	EFX_WARN_ON_ONCE_PARANOID(mss + EFX_TSO2_MAX_HDRLEN +
 				  (tcp->doff << 2u) > ip_tot_len);