From e3fb7d2828a41ceab8653489bae937a7af730e09 Mon Sep 17 00:00:00 2001
From: jfbu <jfbu@free.fr>
Date: Wed, 22 Feb 2017 12:33:46 +0100
Subject: [PATCH] Fix #3445: (latex) make ``\\usepackage[utf8x]{inputenc}``
 usable

---
 sphinx/writers/latex.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sphinx/writers/latex.py b/sphinx/writers/latex.py
index 42b2db0ca..94384ad68 100644
--- a/sphinx/writers/latex.py
+++ b/sphinx/writers/latex.py
@@ -102,8 +102,9 @@ ADDITIONAL_SETTINGS = {
     'pdflatex': {
         'inputenc':     '\\usepackage[utf8]{inputenc}',
         'utf8extra':   ('\\ifdefined\\DeclareUnicodeCharacter\n'
+                        ' \\ifdefined\\DeclareUnicodeCharacterAsOptional\\else\n'
                         '  \\DeclareUnicodeCharacter{00A0}{\\nobreakspace}\n'
-                        '\\fi'),
+                        '\\fi\\fi'),
     },
     'xelatex': {
         'latex_engine': 'xelatex',