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-rw-r--r--doc/sphinx/conf.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/sphinx/conf.py b/doc/sphinx/conf.py
index 9db9095fa..e1c72a621 100644
--- a/doc/sphinx/conf.py
+++ b/doc/sphinx/conf.py
@@ -92,7 +92,7 @@ version = '.'.join([major, minor])
#
# This is also used if you do content translation via gettext catalogs.
# Usually you set "language" from the command line for these cases.
-language = None
+language = 'en'
# List of patterns, relative to source directory, that match files and
# directories to ignore when looking for source files.