diff --git a/docs/en_US/conf.py b/docs/en_US/conf.py
index 89d0aabcdc..a883e248dd 100644
--- a/docs/en_US/conf.py
+++ b/docs/en_US/conf.py
@@ -45,6 +45,7 @@
     'sphinx_markdown_tables',
     'sphinxarg.ext',
     'sphinx.ext.napoleon',
+    'sphinx.ext.viewcode',
 ]
 
 # Add mock modules