diff --git a/Doc/conf.py b/Doc/conf.py
index 62817230154..92cc9387aba 100644
--- a/Doc/conf.py
+++ b/Doc/conf.py
@@ -311,6 +311,7 @@ root_doc = 'contents'
 # Allow translation of index directives
 gettext_additional_targets = [
     'index',
+    'literal-block',
 ]
 
 # Options for HTML output