diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/input/RequiredInputParcel.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/input/RequiredInputParcel.java
index a149ccc57..faf8f7a27 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/input/RequiredInputParcel.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/input/RequiredInputParcel.java
@@ -39,6 +39,20 @@ public class RequiredInputParcel implements Parcelable {
         return new String(mInputData[0]);
     }
 
+    public boolean isTextInput() {
+        switch (mType) {
+            case BACKUP_CODE:
+            case NUMERIC_9X4:
+            case NUMERIC_9X4_AUTOCRYPT:
+            case PASSPHRASE:
+            case PASSPHRASE_AUTH:
+            case PASSPHRASE_SYMMETRIC:
+                return true;
+            default:
+                return false;
+        }
+    }
+
     public enum RequiredInputType {
         PASSPHRASE, PASSPHRASE_SYMMETRIC, PASSPHRASE_AUTH,
         BACKUP_CODE, NUMERIC_9X4, NUMERIC_9X4_AUTOCRYPT,
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/PassphraseDialogActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/PassphraseDialogActivity.java
index 9c3f01212..61ee62cdf 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/PassphraseDialogActivity.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/PassphraseDialogActivity.java
@@ -107,7 +107,7 @@ public class PassphraseDialogActivity extends FragmentActivity {
 
         // this activity itself has no content view (see manifest)
         RequiredInputParcel requiredInput = getIntent().getParcelableExtra(EXTRA_REQUIRED_INPUT);
-        if (requiredInput.mType != RequiredInputType.PASSPHRASE) {
+        if (!requiredInput.isTextInput()) {
             return;
         }
 
@@ -115,7 +115,9 @@ public class PassphraseDialogActivity extends FragmentActivity {
         try {
             KeyRepository keyRepository = KeyRepository.create(this);
             // use empty passphrase for empty passphrase
-            if (keyRepository.getSecretKeyType(requiredInput.getSubKeyId()) == SecretKeyType.PASSPHRASE_EMPTY) {
+            Long subKeyId = requiredInput.getSubKeyId();
+            if (subKeyId != null &&
+                keyRepository.getSecretKeyType(subKeyId) == SecretKeyType.PASSPHRASE_EMPTY) {
                 // also return passphrase back to activity
                 Intent returnIntent = new Intent();
                 cryptoInputParcel = cryptoInputParcel.withPassphrase(new Passphrase(""), requiredInput.getSubKeyId());