diff --git a/milli/src/update/index_documents/mod.rs b/milli/src/update/index_documents/mod.rs
index b27f2042f..e4c798163 100644
--- a/milli/src/update/index_documents/mod.rs
+++ b/milli/src/update/index_documents/mod.rs
@@ -281,6 +281,7 @@ impl<'t, 'u, 'i, 'a> IndexDocuments<'t, 'u, 'i, 'a> {
                 log_every_n: self.log_every_n,
                 max_nb_chunks: self.max_nb_chunks,
                 max_memory: self.max_memory,
+                documents_chunk_size: self.documents_chunk_size,
                 chunk_compression_type: self.chunk_compression_type,
                 chunk_compression_level: self.chunk_compression_level,
                 thread_pool: self.thread_pool,
diff --git a/milli/src/update/settings.rs b/milli/src/update/settings.rs
index ef23286ae..f1b3e2628 100644
--- a/milli/src/update/settings.rs
+++ b/milli/src/update/settings.rs
@@ -65,6 +65,7 @@ pub struct Settings<'a, 't, 'u, 'i> {
     pub(crate) log_every_n: Option<usize>,
     pub(crate) max_nb_chunks: Option<usize>,
     pub(crate) max_memory: Option<usize>,
+    pub(crate) documents_chunk_size: Option<usize>,
     pub(crate) chunk_compression_type: CompressionType,
     pub(crate) chunk_compression_level: Option<u32>,
     pub(crate) thread_pool: Option<&'a ThreadPool>,
@@ -93,6 +94,7 @@ impl<'a, 't, 'u, 'i> Settings<'a, 't, 'u, 'i> {
             log_every_n: None,
             max_nb_chunks: None,
             max_memory: None,
+            documents_chunk_size: None,
             chunk_compression_type: CompressionType::None,
             chunk_compression_level: None,
             thread_pool: None,
@@ -227,6 +229,7 @@ impl<'a, 't, 'u, 'i> Settings<'a, 't, 'u, 'i> {
         indexing_builder.log_every_n = self.log_every_n;
         indexing_builder.max_nb_chunks = self.max_nb_chunks;
         indexing_builder.max_memory = self.max_memory;
+        indexing_builder.documents_chunk_size = self.documents_chunk_size;
         indexing_builder.chunk_compression_type = self.chunk_compression_type;
         indexing_builder.chunk_compression_level = self.chunk_compression_level;
         indexing_builder.thread_pool = self.thread_pool;
diff --git a/milli/src/update/update_builder.rs b/milli/src/update/update_builder.rs
index 6035499b3..561c4bc50 100644
--- a/milli/src/update/update_builder.rs
+++ b/milli/src/update/update_builder.rs
@@ -7,6 +7,7 @@ use crate::{Index, Result};
 pub struct UpdateBuilder<'a> {
     pub(crate) log_every_n: Option<usize>,
     pub(crate) max_nb_chunks: Option<usize>,
+    pub(crate) documents_chunk_size: Option<usize>,
     pub(crate) max_memory: Option<usize>,
     pub(crate) chunk_compression_type: CompressionType,
     pub(crate) chunk_compression_level: Option<u32>,
@@ -19,6 +20,7 @@ impl<'a> UpdateBuilder<'a> {
         UpdateBuilder {
             log_every_n: None,
             max_nb_chunks: None,
+            documents_chunk_size: None,
             max_memory: None,
             chunk_compression_type: CompressionType::None,
             chunk_compression_level: None,
@@ -39,6 +41,10 @@ impl<'a> UpdateBuilder<'a> {
         self.max_memory = Some(max_memory);
     }
 
+    pub fn documents_chunk_size(&mut self, documents_chunk_size: usize) {
+        self.documents_chunk_size = Some(documents_chunk_size);
+    }
+
     pub fn chunk_compression_type(&mut self, chunk_compression_type: CompressionType) {
         self.chunk_compression_type = chunk_compression_type;
     }
@@ -77,6 +83,7 @@ impl<'a> UpdateBuilder<'a> {
         builder.log_every_n = self.log_every_n;
         builder.max_nb_chunks = self.max_nb_chunks;
         builder.max_memory = self.max_memory;
+        builder.documents_chunk_size = self.documents_chunk_size;
         builder.chunk_compression_type = self.chunk_compression_type;
         builder.chunk_compression_level = self.chunk_compression_level;
         builder.thread_pool = self.thread_pool;
@@ -94,6 +101,7 @@ impl<'a> UpdateBuilder<'a> {
         builder.log_every_n = self.log_every_n;
         builder.max_nb_chunks = self.max_nb_chunks;
         builder.max_memory = self.max_memory;
+        builder.documents_chunk_size = self.documents_chunk_size;
         builder.chunk_compression_type = self.chunk_compression_type;
         builder.chunk_compression_level = self.chunk_compression_level;
         builder.thread_pool = self.thread_pool;