diff --git a/Koha/REST/V1/Holds.pm b/Koha/REST/V1/Holds.pm
index 0ca60b1459..92e6e4774e 100644
--- a/Koha/REST/V1/Holds.pm
+++ b/Koha/REST/V1/Holds.pm
@@ -148,13 +148,13 @@ sub add {
             $valid_pickup_location =
               any { $_->branchcode eq $pickup_library_id }
             $item->pickup_locations(
-                { patron => $patron } );
+                { patron => $patron } )->as_list;
         }
         else {
             $valid_pickup_location =
               any { $_->branchcode eq $pickup_library_id }
             $biblio->pickup_locations(
-                { patron => $patron } );
+                { patron => $patron } )->as_list;
         }
 
         return $c->render(