From f77dbc06cc6f5794e828b949b5df16d79ee7c143 Mon Sep 17 00:00:00 2001
From: James Ottaway <jamesottaway@users.noreply.github.com>
Date: Fri, 24 Jun 2016 10:51:20 +1000
Subject: [PATCH] Document `tmpfs` being v2 only

Signed-off-by: James Ottaway <git@james.ottaway.io>
---
 docs/compose-file.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/docs/compose-file.md b/docs/compose-file.md
index b55f250a8..682dacd3f 100644
--- a/docs/compose-file.md
+++ b/docs/compose-file.md
@@ -228,6 +228,8 @@ Custom DNS search domains. Can be a single value or a list.
 
 ### tmpfs
 
+> [Version 2 file format](#version-2) only.
+
 Mount a temporary file system inside the container. Can be a single value or a list.
 
     tmpfs: /run