diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h
index d8fdfdc..3b7fa2a 100644
--- a/include/linux/nfs_fs_sb.h
+++ b/include/linux/nfs_fs_sb.h
@@ -40,6 +40,7 @@
 #define NFS_CS_NORESVPORT	0		/* - use ephemeral src port */
 #define NFS_CS_DISCRTRY		1		/* - disconnect on RPC retry */
 #define NFS_CS_MIGRATION	2		/* - transparent state migr */
+#define NFS_CS_INFINITE_SLOTS	3		/* - don't limit TCP slots */
 	struct sockaddr_storage	cl_addr;	/* server identifier */
 	size_t			cl_addrlen;
 	char *			cl_hostname;	/* hostname of server */