From e07c53a09dab16ec33e44a84a1c5db5e58deb61c Mon Sep 17 00:00:00 2001
From: Julien Palard <julien@palard.fr>
Date: Wed, 26 Oct 2016 08:34:52 +0200
Subject: [PATCH] FIX: Those keys are looked up lowercased.

---
 pelican/readers.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pelican/readers.py b/pelican/readers.py
index a7712f0b..74b617e6 100644
--- a/pelican/readers.py
+++ b/pelican/readers.py
@@ -40,7 +40,7 @@ DUPLICATES_DEFINITIONS_ALLOWED = {
     'category': False,
     'author': False,
     'save_as': False,
-    'URL': False,
+    'url': False,
     'authors': False,
     'slug': False
 }