diff --git a/Doc/conf.py b/Doc/conf.py
index 3860d146a27..915e9317fa4 100644
--- a/Doc/conf.py
+++ b/Doc/conf.py
@@ -310,6 +310,7 @@ root_doc = 'contents'
 # Allow translation of index directives
 gettext_additional_targets = [
     'index',
+    'literal-block',
 ]
 
 # Options for HTML output