diff --git a/invokeai/backend/install/model_install_backend.py b/invokeai/backend/install/model_install_backend.py
index 8d339c627f..8bf716aeb7 100644
--- a/invokeai/backend/install/model_install_backend.py
+++ b/invokeai/backend/install/model_install_backend.py
@@ -225,7 +225,7 @@ class ModelInstall(object):
         if not info:
             logger.warning(f'Unable to parse format of {path}')
             return None
-        model_name = path.stem if info.format == "checkpoint" else path.name
+        model_name = path.stem if path.is_file() else path.name
         if self.mgr.model_exists(model_name, info.base_type, info.model_type):
             raise ValueError(f'A model named "{model_name}" is already installed.')
         attributes = self._make_attributes(path,info)