From f0d905a77c2d546ae99e26818cd1a7ddec9f0c70 Mon Sep 17 00:00:00 2001
From: Vincent Prouillet
Date: Thu, 19 Jan 2017 13:43:47 +0900
Subject: Update readme

---
 README.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/README.md b/README.md
index 45a30f1..aea76d4 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,10 @@ Note that `validator` works in conjunction with serde: in the example we can see
 field is renamed from/to `firstName`. Any error on that field will be in the `firstName` key of the hashmap,
 not `first_name`.
 
+If you are adding a validation on a `Option<..>` field, it will only be ran if there is value. The exception
+being `must_match` that doesn't currently work with `Option` due to me not finding a use case for it. If you have one,
+please comment on https://github.com/Keats/validator/issues/7.
+
 ## Usage
 You will need to import the `Validate` trait, and optionally use the `attr_literals` feature.
 
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