diff --git a/milli/src/update/index_documents/extract/extract_fid_word_count_docids.rs b/milli/src/update/index_documents/extract/extract_fid_word_count_docids.rs
index 289a744da..accf4a510 100644
--- a/milli/src/update/index_documents/extract/extract_fid_word_count_docids.rs
+++ b/milli/src/update/index_documents/extract/extract_fid_word_count_docids.rs
@@ -4,11 +4,12 @@ use std::io::{self, BufReader};
 use obkv::KvReaderU16;
 
 use super::helpers::{
-    create_sorter, merge_cbo_roaring_bitmaps, sorter_into_reader, try_split_array_at,
+    create_sorter, merge_deladd_cbo_roaring_bitmaps, sorter_into_reader, try_split_array_at,
     GrenadParameters,
 };
 use crate::error::SerializationError;
 use crate::index::db_name::DOCID_WORD_POSITIONS;
+use crate::update::del_add::{DelAdd, KvReaderDelAdd, KvWriterDelAdd};
 use crate::Result;
 
 const MAX_COUNTED_WORDS: usize = 30;
@@ -29,7 +30,7 @@ pub fn extract_fid_word_count_docids<R: io::Read + io::Seek>(
 
     let mut fid_word_count_docids_sorter = create_sorter(
         grenad::SortAlgorithm::Unstable,
-        merge_cbo_roaring_bitmaps,
+        merge_deladd_cbo_roaring_bitmaps,
         indexer.chunk_compression_type,
         indexer.chunk_compression_level,
         indexer.max_nb_chunks,
@@ -37,18 +38,52 @@ pub fn extract_fid_word_count_docids<R: io::Read + io::Seek>(
     );
 
     let mut key_buffer = Vec::new();
+    let mut value_buffer = Vec::new();
     let mut cursor = docid_word_positions.into_cursor()?;
     while let Some((key, value)) = cursor.move_on_next()? {
         let (document_id_bytes, fid_bytes) = try_split_array_at(key)
             .ok_or(SerializationError::Decoding { db_name: Some(DOCID_WORD_POSITIONS) })?;
         let document_id = u32::from_be_bytes(document_id_bytes);
 
-        let word_count = KvReaderU16::new(&value).iter().take(MAX_COUNTED_WORDS + 1).count();
-        if word_count <= MAX_COUNTED_WORDS {
-            key_buffer.clear();
-            key_buffer.extend_from_slice(fid_bytes);
-            key_buffer.push(word_count as u8);
-            fid_word_count_docids_sorter.insert(&key_buffer, document_id.to_ne_bytes())?;
+        let del_add_reader = KvReaderDelAdd::new(&value);
+        let deletion = del_add_reader
+            // get deleted words
+            .get(DelAdd::Deletion)
+            // count deleted words
+            .map(|deletion| KvReaderU16::new(deletion).iter().take(MAX_COUNTED_WORDS + 1).count())
+            // keep the count if under or equal to MAX_COUNTED_WORDS
+            .filter(|&word_count| word_count <= MAX_COUNTED_WORDS);
+        let addition = del_add_reader
+            // get added words
+            .get(DelAdd::Addition)
+            // count added words
+            .map(|addition| KvReaderU16::new(addition).iter().take(MAX_COUNTED_WORDS + 1).count())
+            // keep the count if under or equal to MAX_COUNTED_WORDS
+            .filter(|&word_count| word_count <= MAX_COUNTED_WORDS);
+
+        if deletion != addition {
+            // Insert deleted word count in sorter if exist.
+            if let Some(word_count) = deletion {
+                value_buffer.clear();
+                let mut value_writer = KvWriterDelAdd::new(&mut value_buffer);
+                value_writer.insert(DelAdd::Deletion, document_id.to_ne_bytes()).unwrap();
+                key_buffer.clear();
+                key_buffer.extend_from_slice(fid_bytes);
+                key_buffer.push(word_count as u8);
+                fid_word_count_docids_sorter
+                    .insert(&key_buffer, value_writer.into_inner().unwrap())?;
+            }
+            // Insert added word count in sorter if exist.
+            if let Some(word_count) = addition {
+                value_buffer.clear();
+                let mut value_writer = KvWriterDelAdd::new(&mut value_buffer);
+                value_writer.insert(DelAdd::Addition, document_id.to_ne_bytes()).unwrap();
+                key_buffer.clear();
+                key_buffer.extend_from_slice(fid_bytes);
+                key_buffer.push(word_count as u8);
+                fid_word_count_docids_sorter
+                    .insert(&key_buffer, value_writer.into_inner().unwrap())?;
+            }
         }
     }