diff --git a/src/rdata/dnssec.rs b/src/rdata/dnssec.rs
index fdb79dd52..55ada8d0b 100644
--- a/src/rdata/dnssec.rs
+++ b/src/rdata/dnssec.rs
@@ -1735,7 +1735,7 @@ pub struct Ds<Octs> {
     digest_type: DigestAlg,
     #[cfg_attr(
         feature = "serde",
-        serde(with = "crate::utils::base64::serde")
+        serde(with = "crate::utils::base16::serde")
     )]
     digest: Octs,
 }