diff --git a/central_backend/src/crypto/crl_extension.rs b/central_backend/src/crypto/crl_extension.rs
index bf1236d..ff375b3 100644
--- a/central_backend/src/crypto/crl_extension.rs
+++ b/central_backend/src/crypto/crl_extension.rs
@@ -16,11 +16,13 @@ impl CRLDistributionPointExt {
         let crl_bytes = asn1::write(|w| {
             w.write_element(&asn1::SequenceWriter::new(&|w| {
                 w.write_element(&asn1::SequenceWriter::new(&|w| {
-                    w.write_tlv(tag_a0, |w| {
+                    w.write_tlv(tag_a0, None, |w: &mut asn1::WriteBuf| {
                         w.push_slice(&asn1::write(|w| {
-                            w.write_tlv(tag_a0, |w| {
+                            w.write_tlv(tag_a0, None, |w: &mut asn1::WriteBuf| {
                                 w.push_slice(&asn1::write(|w| {
-                                    w.write_tlv(tag_86, |b| b.push_slice(self.url.as_bytes()))?;
+                                    w.write_tlv(tag_86, None, |b| {
+                                        b.push_slice(self.url.as_bytes())
+                                    })?;
                                     Ok(())
                                 })?)
                             })?;