diff --git a/docs/source/conf.py b/docs/source/conf.py
index cb93bdfb..439c0a1a 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -91,9 +91,6 @@ todo_include_todos = False
 
 # -- Options for HTML output ----------------------------------------------
 
-# Don't use any extension for HTML files
-html_file_suffix = ""
-
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 #