diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index e8ff178..b8cedce 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -56,6 +56,7 @@
 	struct rpc_cred		*cl_machine_cred;
 
 #if IS_ENABLED(CONFIG_NFS_V4)
+	struct list_head	cl_ds_clients; /* auth flavor data servers */
 	u64			cl_clientid;	/* constant */
 	nfs4_verifier		cl_confirm;	/* Clientid verifier */
 	unsigned long		cl_state;