diff --git a/inspire_schemas/records/elements/acquisition_source.yml b/inspire_schemas/records/elements/acquisition_source.yml
index c89b1b2a..c06d2355 100644
--- a/inspire_schemas/records/elements/acquisition_source.yml
+++ b/inspire_schemas/records/elements/acquisition_source.yml
@@ -55,6 +55,9 @@ properties:
 
             `beard`
                 when created after author disambiguation
+
+            `hepdata`
+                when obtained through the HEPData harvest
         enum:
         - submitter
         - oai