diff --git a/dlt/destinations/impl/filesystem/sql_client.py b/dlt/destinations/impl/filesystem/sql_client.py
index 20020dbbfe..e3113e7a8b 100644
--- a/dlt/destinations/impl/filesystem/sql_client.py
+++ b/dlt/destinations/impl/filesystem/sql_client.py
@@ -69,7 +69,7 @@ def _create_default_secret_name(self) -> str:
         escaped_bucket_name = regex.sub("", self.fs_client.config.bucket_url.lower())
         return f"secret_{escaped_bucket_name}"
 
-    def drop_authentication(self, secret_name: str) -> None:
+    def drop_authentication(self, secret_name: str = None) -> None:
         if not secret_name:
             secret_name = self._create_default_secret_name()
         self._conn.sql(f"DROP PERSISTENT SECRET {secret_name}")