diff --git a/doc/source/conf.py b/doc/source/conf.py
index 8514d0db295d6641493ce69f077c7c25e9c03cf8..508771b72b235283917373227acc72c7331516c0 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -223,9 +223,6 @@ latex_documents = [
 # Documents to append as an appendix to all manuals.
 #latex_appendices = []
 
-# If false, no module index is generated.
-latex_use_modindex = False
-
 # This is needed too.
 latex_domain_indices = False