+#ifndef HAVE_IBV_MLX4_WQE_LSO_SEG
+/*
+ * WQE LSO segment structure.
+ * Defined here as backward compatibility for rdma-core v17 and below.
+ * Similar definition is found in infiniband/mlx4dv.h in rdma-core v18
+ * and above.
+ */
+struct mlx4_wqe_lso_seg {
+ rte_be32_t mss_hdr_size;
+ rte_be32_t header[];
+};
+#endif
+