diff --git a/src/packet/secret_key.js b/src/packet/secret_key.js
index 10b22814..ea7edc84 100644
--- a/src/packet/secret_key.js
+++ b/src/packet/secret_key.js
@@ -415,6 +415,9 @@ SecretKey.prototype.postCloneTypeFix = function() {
   if (this.keyid) {
     this.keyid = type_keyid.fromClone(this.keyid);
   }
+  if (this.s2k) {
+    this.s2k = type_s2k.fromClone(this.s2k);
+  }
 };
 
 export default SecretKey;
diff --git a/test/general/key.js b/test/general/key.js
index 87edd60e..18e4af4b 100644
--- a/test/general/key.js
+++ b/test/general/key.js
@@ -2210,6 +2210,16 @@ describe('Key', function() {
 
   describe('V4', versionSpecificTests);
 
+  tryTests('V4 - With Worker', versionSpecificTests, {
+    if: typeof window !== 'undefined' && window.Worker,
+    before: async function() {
+      await openpgp.initWorker({ path: '../dist/openpgp.worker.js' });
+    },
+    after: function() {
+      openpgp.destroyWorker();
+    }
+  });
+
   let v5_keysVal;
   let aead_protectVal;
   tryTests('V5', versionSpecificTests, {