diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/PromoteKeyOperation.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/PromoteKeyOperation.java
index 80a787859..22b96db6a 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/PromoteKeyOperation.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/operations/PromoteKeyOperation.java
@@ -38,7 +38,6 @@ import org.sufficientlysecure.keychain.provider.KeyWritableRepository;
 import org.sufficientlysecure.keychain.service.PromoteKeyringParcel;
 import org.sufficientlysecure.keychain.service.input.CryptoInputParcel;
 import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils;
-import org.sufficientlysecure.keychain.util.ProgressScaler;
 
 /** An operation which promotes a public key ring to a secret one.
  *
@@ -67,17 +66,18 @@ public class PromoteKeyOperation extends BaseReadWriteOperation<PromoteKeyringPa
             try {
 
                 log.add(LogType.MSG_PR_FETCHING, 1,
-                        KeyFormattingUtils.convertKeyIdToHex(promoteKeyringParcel.mKeyRingId));
+                        KeyFormattingUtils.convertKeyIdToHex(promoteKeyringParcel.getMasterKeyId()));
                 CanonicalizedPublicKeyRing pubRing =
-                        mKeyRepository.getCanonicalizedPublicKeyRing(promoteKeyringParcel.mKeyRingId);
+                        mKeyRepository.getCanonicalizedPublicKeyRing(promoteKeyringParcel.getMasterKeyId());
 
-                if (promoteKeyringParcel.mSubKeyIds == null) {
+                long[] subKeyIds = promoteKeyringParcel.getSubKeyIds();
+                if (subKeyIds == null) {
                     log.add(LogType.MSG_PR_ALL, 1);
                 } else {
                     // sort for binary search
                     for (CanonicalizedPublicKey key : pubRing.publicKeyIterator()) {
                         long subKeyId = key.getKeyId();
-                        if (naiveIndexOf(promoteKeyringParcel.mSubKeyIds, subKeyId) != null) {
+                        if (naiveIndexOf(subKeyIds, subKeyId) != null) {
                             log.add(LogType.MSG_PR_SUBKEY_MATCH, 1,
                                     KeyFormattingUtils.convertKeyIdToHex(subKeyId));
                         } else {
@@ -88,8 +88,7 @@ public class PromoteKeyOperation extends BaseReadWriteOperation<PromoteKeyringPa
                 }
 
                 // create divert-to-card secret key from public key
-                promotedRing = pubRing.createDivertSecretRing(promoteKeyringParcel.mCardAid,
-                        promoteKeyringParcel.mSubKeyIds);
+                promotedRing = pubRing.createDivertSecretRing(promoteKeyringParcel.getCardAid(), subKeyIds);
 
             } catch (NotFoundException e) {
                 log.add(LogType.MSG_PR_ERROR_KEY_NOT_FOUND, 2);
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/PromoteKeyringParcel.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/PromoteKeyringParcel.java
index d268c3694..9383a7d80 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/PromoteKeyringParcel.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/PromoteKeyringParcel.java
@@ -19,48 +19,23 @@
 
 package org.sufficientlysecure.keychain.service;
 
-import android.os.Parcel;
+
 import android.os.Parcelable;
+import android.support.annotation.Nullable;
 
-public class PromoteKeyringParcel implements Parcelable {
+import com.google.auto.value.AutoValue;
 
-    public long mKeyRingId;
-    public byte[] mCardAid;
-    public long[] mSubKeyIds;
 
-    public PromoteKeyringParcel(long keyRingId, byte[] cardAid, long[] subKeyIds) {
-        mKeyRingId = keyRingId;
-        mCardAid = cardAid;
-        mSubKeyIds = subKeyIds;
+@AutoValue
+public abstract class PromoteKeyringParcel implements Parcelable {
+    public abstract long getMasterKeyId();
+    @Nullable
+    public abstract byte[] getCardAid();
+    @Nullable
+    public abstract long[] getSubKeyIds();
+
+    public static PromoteKeyringParcel createPromoteKeyringParcel(long keyRingId, byte[] cardAid,
+            @Nullable long[] subKeyIds) {
+        return new AutoValue_PromoteKeyringParcel(keyRingId, cardAid, subKeyIds);
     }
-
-    protected PromoteKeyringParcel(Parcel in) {
-        mKeyRingId = in.readLong();
-        mCardAid = in.createByteArray();
-        mSubKeyIds = in.createLongArray();
-    }
-
-    @Override
-    public int describeContents() {
-        return 0;
-    }
-
-    @Override
-    public void writeToParcel(Parcel dest, int flags) {
-        dest.writeLong(mKeyRingId);
-        dest.writeByteArray(mCardAid);
-        dest.writeLongArray(mSubKeyIds);
-    }
-
-    public static final Parcelable.Creator<PromoteKeyringParcel> CREATOR = new Parcelable.Creator<PromoteKeyringParcel>() {
-        @Override
-        public PromoteKeyringParcel createFromParcel(Parcel in) {
-            return new PromoteKeyringParcel(in);
-        }
-
-        @Override
-        public PromoteKeyringParcel[] newArray(int size) {
-            return new PromoteKeyringParcel[size];
-        }
-    };
 }
\ No newline at end of file
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeySecurityTokenFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeySecurityTokenFragment.java
index 4a7f4861d..bbea3973b 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeySecurityTokenFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/ViewKeySecurityTokenFragment.java
@@ -213,7 +213,7 @@ public class ViewKeySecurityTokenFragment
 
     @Override
     public PromoteKeyringParcel createOperationInput() {
-        return new PromoteKeyringParcel(mMasterKeyId, mCardAid, mSubKeyIds);
+        return PromoteKeyringParcel.createPromoteKeyringParcel(mMasterKeyId, mCardAid, mSubKeyIds);
     }
 
     @Override
diff --git a/OpenKeychain/src/test/java/org/sufficientlysecure/keychain/operations/PromoteKeyOperationTest.java b/OpenKeychain/src/test/java/org/sufficientlysecure/keychain/operations/PromoteKeyOperationTest.java
index 9b58ab511..00e6bc94e 100644
--- a/OpenKeychain/src/test/java/org/sufficientlysecure/keychain/operations/PromoteKeyOperationTest.java
+++ b/OpenKeychain/src/test/java/org/sufficientlysecure/keychain/operations/PromoteKeyOperationTest.java
@@ -106,7 +106,8 @@ public class PromoteKeyOperationTest {
         PromoteKeyOperation op = new PromoteKeyOperation(RuntimeEnvironment.application,
                 KeyWritableRepository.createDatabaseReadWriteInteractor(RuntimeEnvironment.application), null, null);
 
-        PromoteKeyResult result = op.execute(new PromoteKeyringParcel(mStaticRing.getMasterKeyId(), null, null), null);
+        PromoteKeyResult result = op.execute(
+                PromoteKeyringParcel.createPromoteKeyringParcel(mStaticRing.getMasterKeyId(), null, null), null);
 
         Assert.assertTrue("promotion must succeed", result.success());
 
@@ -132,7 +133,8 @@ public class PromoteKeyOperationTest {
 
         byte[] aid = Hex.decode("D2760001240102000000012345670000");
 
-        PromoteKeyResult result = op.execute(new PromoteKeyringParcel(mStaticRing.getMasterKeyId(), aid, null), null);
+        PromoteKeyResult result = op.execute(
+                PromoteKeyringParcel.createPromoteKeyringParcel(mStaticRing.getMasterKeyId(), aid, null), null);
 
         Assert.assertTrue("promotion must succeed", result.success());
 
@@ -160,9 +162,10 @@ public class PromoteKeyOperationTest {
         // only promote the first, rest stays dummy
         long keyId = KeyringTestingHelper.getSubkeyId(mStaticRing, 1);
 
-        PromoteKeyResult result = op.execute(new PromoteKeyringParcel(mStaticRing.getMasterKeyId(), aid, new long[] {
-            keyId
-        }), null);
+        PromoteKeyResult result = op.execute(
+                PromoteKeyringParcel.createPromoteKeyringParcel(mStaticRing.getMasterKeyId(), aid, new long[] {
+                    keyId
+                }), null);
 
         Assert.assertTrue("promotion must succeed", result.success());