diff --git a/api/core/rag/datasource/vdb/opensearch/opensearch_vector.py b/api/core/rag/datasource/vdb/opensearch/opensearch_vector.py
index b156be1a22..6a6c2b73ef 100644
--- a/api/core/rag/datasource/vdb/opensearch/opensearch_vector.py
+++ b/api/core/rag/datasource/vdb/opensearch/opensearch_vector.py
@@ -255,7 +255,8 @@ class OpenSearchVector(BaseVector):
                             Field.METADATA_KEY.value: {
                                 "type": "object",
                                 "properties": {
-                                    "doc_id": {"type": "keyword"}  # Map doc_id to keyword type
+                                    "doc_id": {"type": "keyword"},  # Map doc_id to keyword type
+                                    "document_id": {"type": "keyword"},
                                 },
                             },
                         }