diff --git a/universql/warehouse/duckdb.py b/universql/warehouse/duckdb.py
index 90fd3b4..c0c3661 100644
--- a/universql/warehouse/duckdb.py
+++ b/universql/warehouse/duckdb.py
@@ -338,7 +338,7 @@ def _get_iceberg_ref(self, default_namespace, destination_table, ):
     def _get_db_path(self, db_name):
         database_path = self.catalog.context.get('database_path')
         if database_path is not None:
-            duckdb_path = database_path / f'{db_name}.duckdb'
+            duckdb_path = os.path.join(database_path, f'{db_name}.duckdb')
         else:
             duckdb_path = ':memory:'
         return duckdb_path