diff --git a/docs/conf.py b/docs/conf.py
index 8cb63290..2e924acb 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -84,7 +84,7 @@ exclude_trees = ['_build']
 pygments_style = 'sphinx'
 
 # A list of ignored prefixes for module index sorting.
-#modindex_common_prefix = []
+modindex_common_prefix = ['mopidy.']
 
 
 # -- Options for HTML output ---------------------------------------------------