diff --git a/drivers/infiniband/core/cm.c b/drivers/infiniband/core/cm.c
index 450adfe0a4f1c5e4ed847c340e111ca62d000cbb..3f6705f3083ac65e7e501e9b7fa8b9cd403c587b 100644
--- a/drivers/infiniband/core/cm.c
+++ b/drivers/infiniband/core/cm.c
@@ -3152,6 +3152,7 @@ static int cm_init_qp_rtr_attr(struct cm_id_private *cm_id_priv,
 		}
 		if (cm_id_priv->alt_av.ah_attr.dlid) {
 			*qp_attr_mask |= IB_QP_ALT_PATH;
+			qp_attr->alt_port_num = cm_id_priv->alt_av.port->port_num;
 			qp_attr->alt_ah_attr = cm_id_priv->alt_av.ah_attr;
 		}
 		ret = 0;