diff --git a/packages/leann-core/src/leann/registry.py b/packages/leann-core/src/leann/registry.py
index 6778745..d4a559a 100644
--- a/packages/leann-core/src/leann/registry.py
+++ b/packages/leann-core/src/leann/registry.py
@@ -33,6 +33,8 @@ def autodiscover_backends():
     discovered_backends = []
     for dist in importlib.metadata.distributions():
         dist_name = dist.metadata["name"]
+        if dist_name is None:
+            continue
         if dist_name.startswith("leann-backend-"):
             backend_module_name = dist_name.replace("-", "_")
             discovered_backends.append(backend_module_name)