diff --git a/doc/conf.py b/doc/conf.py
index 79f75ff34ec2fe9df4eb0c2bd1e9970237b50136..3351d84f38f1194b6126ed20b40ceb32c9366dce 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -30,7 +30,7 @@ html_logo = 'images/arbor-lines-proto-colour.svg'
 html_favicon = 'images/arbor-lines-proto-colour-notext.svg'
 
 intersphinx_mapping = {
-    'sphinx': ('https://lfpykit.readthedocs.io/en/latest/', None),
+    'lfpykit': ('https://lfpykit.readthedocs.io/en/latest/', None),
 }
 
 project = 'Arbor'