diff --git a/api/v1/swagger/paths/biblios.yaml b/api/v1/swagger/paths/biblios.yaml
index 93deb16e31..d250237b68 100644
--- a/api/v1/swagger/paths/biblios.yaml
+++ b/api/v1/swagger/paths/biblios.yaml
@@ -346,6 +346,16 @@
     summary: Get items for a biblio
     parameters:
       - $ref: "../swagger.yaml#/parameters/biblio_id_pp"
+      - name: x-koha-embed
+        in: header
+        required: false
+        description: Embed list sent as a request header
+        type: array
+        items:
+          type: string
+          enum:
+            - +strings
+        collectionFormat: csv
       - $ref: "../swagger.yaml#/parameters/match"
       - $ref: "../swagger.yaml#/parameters/order_by"
       - $ref: "../swagger.yaml#/parameters/page"