diff --git a/async_substrate_interface/types.py b/async_substrate_interface/types.py
index a627132..b9fbfae 100644
--- a/async_substrate_interface/types.py
+++ b/async_substrate_interface/types.py
@@ -1127,7 +1127,7 @@ def _get_metadata_storage_functions(self, runtime: Runtime) -> list[dict[str, An
                         self.serialize_storage_item(
                             storage_item=storage,
                             module=module,
-                            spec_version_id=self.runtime.runtime_version,
+                            spec_version_id=runtime.runtime_version,
                             runtime=runtime,
                         )
                     )