diff --git a/integrations/mongodb_atlas/src/haystack_integrations/document_stores/mongodb_atlas/document_store.py b/integrations/mongodb_atlas/src/haystack_integrations/document_stores/mongodb_atlas/document_store.py
index c4b55e65f..f13924185 100644
--- a/integrations/mongodb_atlas/src/haystack_integrations/document_stores/mongodb_atlas/document_store.py
+++ b/integrations/mongodb_atlas/src/haystack_integrations/document_stores/mongodb_atlas/document_store.py
@@ -390,7 +390,7 @@ def _fulltext_retrieval(
         except Exception as e:
             error_msg = f"Failed to retrieve documents from MongoDB Atlas: {e}"
             if filters:
-                error_msg += "\nEnsure fields in filters are included in the `keyword_search_index` configuration."
+                error_msg += "\nEnsure fields in filters are included in the `full_text_search_index` configuration."
             raise DocumentStoreError(error_msg) from e
 
         return [self._mongo_doc_to_haystack_doc(doc) for doc in documents]