diff --git a/Koha/Authority.pm b/Koha/Authority.pm
index 65c843408d..6a410ba9e3 100644
--- a/Koha/Authority.pm
+++ b/Koha/Authority.pm
@@ -303,7 +303,6 @@ sub to_api_mapping {
         authtypecode      => 'framework_id',
         datecreated       => 'created_date',
         linkid            => undef,
-        marc              => undef,
         marcxml           => undef,
         modification_time => 'modified_date',
         origincode        => undef,