diff --git a/buildingmotif/bin/cli.py b/buildingmotif/bin/cli.py
index f7c523f72..8a7d6e358 100644
--- a/buildingmotif/bin/cli.py
+++ b/buildingmotif/bin/cli.py
@@ -78,7 +78,6 @@ def get_db_uri(args) -> str:
         "--libraries",
         help="Filename of the libraries YAML file specifying what "
         "should be loaded into BuildingMOTIF",
-        default="libraries.yml",
         nargs="+",
         dest="library_manifest_file",
     ),