diff --git a/src/datasets/arrow_dataset.py b/src/datasets/arrow_dataset.py
index a0b8481825d..d3db912357b 100644
--- a/src/datasets/arrow_dataset.py
+++ b/src/datasets/arrow_dataset.py
@@ -4705,7 +4705,7 @@ def add_faiss_index(
                 This is passed to the index factory of Faiss to create the index.
                 Default index class is ``IndexFlat``.
             metric_type (Optional :obj:`int`):
-                Type of metric. Ex: faiss.faiss.METRIC_INNER_PRODUCT or faiss.METRIC_L2.
+                Type of metric. Ex: faiss.METRIC_INNER_PRODUCT or faiss.METRIC_L2.
             custom_index (Optional :obj:`faiss.Index`):
                 Custom Faiss index that you already have instantiated and configured for your needs.
             batch_size (Optional :obj:`int`): Size of the batch to use while adding vectors to the FaissIndex. Default value is 1000.