diff --git a/crates/milli/src/update/new/indexer/post_processing/facet_bulk.rs b/crates/milli/src/update/new/indexer/post_processing/facet_bulk.rs
index 0951292e5..7fed74a9f 100644
--- a/crates/milli/src/update/new/indexer/post_processing/facet_bulk.rs
+++ b/crates/milli/src/update/new/indexer/post_processing/facet_bulk.rs
@@ -146,7 +146,7 @@ fn compute_level(
                 writer.insert(left_bound, &ser_buffer)?;
             }
 
-            writer_into_reader(writer).map_err(Into::into)
+            writer_into_reader(writer)
         })
         .collect()
 }