diff --git a/docs/api/conf.py b/docs/api/conf.py
index 53deb1951e..7730b99e17 100644
--- a/docs/api/conf.py
+++ b/docs/api/conf.py
@@ -92,6 +92,9 @@
 # so a file named "default.css" will overwrite the builtin "default.css".
 html_static_path = ['_static']
 
+html_sidebars = {
+    '**': ['docs-sidebar.html'],
+}
 
 locale_dirs = ['locale/']   # path is example but recommended.
 gettext_compact = False     # optional.