diff --git a/surfsense_backend/app/indexing_pipeline/chunk_reconciler.py b/surfsense_backend/app/indexing_pipeline/chunk_reconciler.py
index 9354aeb9f..dd57a44d1 100644
--- a/surfsense_backend/app/indexing_pipeline/chunk_reconciler.py
+++ b/surfsense_backend/app/indexing_pipeline/chunk_reconciler.py
@@ -19,6 +19,9 @@ class ExistingChunk:
     id: int
     content: str
     position: int
+    # Stored char span; None for legacy rows indexed before spans existed.
+    start_char: int | None = None
+    end_char: int | None = None
 
 
 @dataclass(frozen=True, slots=True)