diff --git a/Doc/conf.py b/Doc/conf.py
index 92cc9387abae31..dd5732c8365cc4 100644
--- a/Doc/conf.py
+++ b/Doc/conf.py
@@ -312,6 +312,7 @@
 gettext_additional_targets = [
     'index',
     'literal-block',
+    'doctest-block',
 ]
 
 # Options for HTML output