diff --git a/conf.py b/conf.py
index 7acc981f3d..fb988499c3 100644
--- a/conf.py
+++ b/conf.py
@@ -414,7 +414,6 @@ texinfo_documents = [
 
 # Example configuration for intersphinx: refer to the Python standard library.
 intersphinx_mapping = {"cpython": ('https://docs.python.org/3/', None),
-                       "bus_device": ('https://circuitpython.readthedocs.io/projects/busdevice/en/latest/', None),
                        "register": ('https://circuitpython.readthedocs.io/projects/register/en/latest/', None)}
 
 # Adapted from sphinxcontrib-redirects