LDNS cannot parse IPSECKEY RR

Oct 26 11:00:08 fou ods-signerd: stderr from sorter: Warning: Syntax error, could not parse the RR's rdata:
Oct 26 11:00:08 fou ods-signerd: stderr from sorter: 41: ^I^I^IIN^IIPSECKEY^I10 1 2 192.0.2.38 AQNRU3mG7TVTO2BkR47usntb102uFJtugbo6BSGvgqt4AQ==

Using example:

IN IPSECKEY 10 1 2 192.0.2.38 AQNRU3mG7TVTO2BkR47usntb102uFJtugbo6BSGvgqt4AQ==

From RFC4025