diff --git a/src/packet/clone.js b/src/packet/clone.js
index e5d5b048..5253a9f9 100644
--- a/src/packet/clone.js
+++ b/src/packet/clone.js
@@ -136,7 +136,8 @@ function packetlistCloneToCleartextMessage(clone) {
 //verification objects
 function packetlistCloneToSignatures(clone) {
   clone.keyid = type_keyid.fromClone(clone.keyid);
-  clone.signature = new Signature(clone.signature);
+  const packetlist = List.fromStructuredClone(clone.signature);
+  clone.signature = new Signature(packetlist);
   return clone;
 }