diff --git a/datacube/index/memory/_products.py b/datacube/index/memory/_products.py
index fffa2ae96..78df07d7d 100644
--- a/datacube/index/memory/_products.py
+++ b/datacube/index/memory/_products.py
@@ -36,7 +36,7 @@ def add(self, product: Product, allow_table_lock: bool = False) -> Product:
                 f'Metadata Type {product.name}'
             )
         else:
-            mdt = self.metadata_type_resource.get_by_name(product.metadata_type.name)
+            mdt = self._index.metadata_types.get_by_name(product.metadata_type.name)
             if mdt is None:
                 _LOG.warning(f'Adding metadata_type "{product.metadata_type.name}" as it doesn\'t exist')
                 product.metadata_type = self._index.metadata_types.add(product.metadata_type,
diff --git a/docs/about/whats_new.rst b/docs/about/whats_new.rst
index 1b0a18666..ae222ab08 100644
--- a/docs/about/whats_new.rst
+++ b/docs/about/whats_new.rst
@@ -31,6 +31,7 @@ v1.9.next
 - EP13 API changes to metadata and product resources. (:pull:`1536`)
 - Phase 1 of EP13 API changes to dataset resource - get_unsafe, get_derived, temporal_extent. (:pull:`1538`)
 - Add product argument to spatial_extent method, as per EP13. (:pull:`1539`)
+- Index driver API type hint cleanup. (:pull:`1540`)
 
 
 v1.8.next