Index: sys/dev/ena/ena.c
===================================================================
--- sys/dev/ena/ena.c
+++ sys/dev/ena/ena.c
@@ -2678,7 +2678,7 @@
 	switch (etype) {
 	case ETHERTYPE_IP:
 		ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV4;
-		if (ip->ip_off == 0)
+		if ((ip->ip_off & htons(IP_DF)) != 0)
 			ena_tx_ctx->df = 1;
 		break;
 	case ETHERTYPE_IPV6: