diff --git a/docs/source/conf.py b/docs/source/conf.py
index 5ada39bf2..2a8c8bfe9 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -152,8 +152,7 @@
 
 
 # Tell sphinx what the primary language being documented is.
-# Java is not one of the available options. Keep it as cpp.
-primary_domain = 'cpp'
+primary_domain = 'java'
 
 # Tell sphinx what the pygments highlight language should be.
 highlight_language = 'java'