diff --git a/api/v1/swagger/paths/items.yaml b/api/v1/swagger/paths/items.yaml
index b426b670f6..d4b0d8f820 100644
--- a/api/v1/swagger/paths/items.yaml
+++ b/api/v1/swagger/paths/items.yaml
@@ -21,6 +21,7 @@
           type: string
           enum:
             - +strings
+            - biblio
         collectionFormat: csv
       - $ref: "../swagger.yaml#/parameters/match"
       - $ref: "../swagger.yaml#/parameters/order_by"