diff --git a/doc/conf.py b/doc/conf.py
index 96dd7fc81a06c1882f0e7dc27782dee51be067a6..110a9775b7bdbac7256588554bf4d5b3fa533c3a 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -346,7 +346,7 @@ epub_exclude_files = ['search.html']
 autoclass_content = 'class'
 
 # Document private members and special members (e.g. __init__)
-autodocsourc_default_flags = ['special-members']
+autodocsourc_default_flags = ['private-members', 'special-members']
 
 # Documentation for python modules is in the same order
 # as the source code.