diff --git a/lib/dpif-netlink.c b/lib/dpif-netlink.c
index a9d60f72f..de43d8059 100644
--- a/lib/dpif-netlink.c
+++ b/lib/dpif-netlink.c
@@ -645,6 +645,7 @@ destroy_all_channels(struct dpif_netlink *dpif)
         vport_request.cmd = OVS_VPORT_CMD_SET;
         vport_request.dp_ifindex = dpif->dp_ifindex;
         vport_request.port_no = u32_to_odp(i);
+        vport_request.n_upcall_pids = 1;
         vport_request.upcall_pids = &upcall_pids;
         dpif_netlink_vport_transact(&vport_request, NULL, NULL);