diff --git a/api-ref/source/conf.py b/api-ref/source/conf.py
index 71dbb05..85083e6 100644
--- a/api-ref/source/conf.py
+++ b/api-ref/source/conf.py
@@ -98,4 +98,9 @@ html_static_path = ['_static']
 html_copy_source = False
 
 # -- Options for PDF output --------------------------------------------------
-latex_documents = []
+latex_documents = [
+    ('index',
+     'None.tex',
+     u'Document Database Service - API Reference',
+     u'OpenTelekomCloud', 'manual'),
+]