From 5b884b5bf9f3bc35b112cacb774be95171676a58 Mon Sep 17 00:00:00 2001
From: Armin Ronacher <armin.ronacher@active-4.com>
Date: Tue, 20 Mar 2018 13:38:22 +0100
Subject: [PATCH] Added some missing UFCs

---
 serde_derive/src/de.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/serde_derive/src/de.rs b/serde_derive/src/de.rs
index acc1086b..dae7176e 100644
--- a/serde_derive/src/de.rs
+++ b/serde_derive/src/de.rs
@@ -2491,7 +2491,9 @@ fn deserialize_map_in_place(
 
     let collected_deny_unknown_fields = if cattrs.has_flatten() && cattrs.deny_unknown_fields() {
         Some(quote! {
-            if let Some(Some((__key, _))) = __collect.into_iter().filter(|x| x.is_some()).next() {
+            if let _serde::export::Some(_serde::export::Some((__key, _))) =
+                __collect.into_iter().filter(|x| x.is_some()).next()
+            {
                 return _serde::export::Err(
                     _serde::de::Error::custom(format_args!("unknown field `{}`", &__key)));
             }