diff --git a/doc/conf.py b/doc/conf.py
index 740eb85c51c..f22871dca34 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -33,7 +33,6 @@ else:
 
 pygments_style = 'sphinx'
 
-html_file_suffix = ''
 html_theme = 'ceph'
 html_theme_path = ['_themes']
 html_title = "Ceph Documentation"