diff --git a/sql/structure.sql b/sql/structure.sql
index 8188fb02eecc74a1432944053754ef7425f71763..84530b0ec9a1a3758f11179c0a3ed370d1a450a6 100755
--- a/sql/structure.sql
+++ b/sql/structure.sql
@@ -2193,6 +2193,8 @@ CREATE OR REPLACE VIEW res_view_letterbox AS
     r.source,
     r.author,
     r.reference_number,
+    r.external_id,
+    r.external_link,
     r.custom_t1 AS doc_custom_t1,
     r.custom_t2 AS doc_custom_t2,
     r.custom_t3 AS doc_custom_t3,