diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/ServiceProgressHandler.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/ServiceProgressHandler.java
index 5625408f8..a0bb250d4 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/ServiceProgressHandler.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/service/ServiceProgressHandler.java
@@ -18,14 +18,16 @@
 package org.sufficientlysecure.keychain.service;
 
 import android.app.Activity;
-import android.app.FragmentManager;
+import android.content.Intent;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.support.v4.app.FragmentActivity;
+import android.support.v4.app.FragmentManager;
 
 import org.sufficientlysecure.keychain.Constants;
 import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.operations.results.CertifyResult;
 import org.sufficientlysecure.keychain.ui.dialog.ProgressDialogFragment;
 import org.sufficientlysecure.keychain.ui.util.Notify;
 import org.sufficientlysecure.keychain.util.Log;
@@ -97,7 +99,7 @@ public class ServiceProgressHandler extends Handler {
 
         // TODO: This is a hack!, see
         // http://stackoverflow.com/questions/10114324/show-dialogfragment-from-onactivityresult
-        final FragmentManager manager = activity.getFragmentManager();
+        final FragmentManager manager = activity.getSupportFragmentManager();
         Handler handler = new Handler();
         handler.post(new Runnable() {
             public void run() {
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/ProgressDialogFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/ProgressDialogFragment.java
index 130d22b37..52a90b323 100644
--- a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/ProgressDialogFragment.java
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/dialog/ProgressDialogFragment.java
@@ -19,7 +19,6 @@ package org.sufficientlysecure.keychain.ui.dialog;
 
 import android.app.Activity;
 import android.app.Dialog;
-import android.app.DialogFragment;
 import android.app.ProgressDialog;
 import android.content.DialogInterface;
 import android.content.DialogInterface.OnKeyListener;
@@ -27,6 +26,7 @@ import android.content.Intent;
 import android.graphics.Color;
 import android.os.Bundle;
 import android.support.annotation.NonNull;
+import android.support.v4.app.DialogFragment;
 import android.view.ContextThemeWrapper;
 import android.view.KeyEvent;
 import android.view.View;
@@ -52,6 +52,7 @@ public class ProgressDialogFragment extends DialogFragment {
      * @param message the message to be displayed initially above the progress bar
      * @param style the progress bar style, as defined in ProgressDialog (horizontal or spinner)
      * @param cancelable should we let the user cancel this operation
+     * @return
      */
     public static ProgressDialogFragment newInstance(String message, int style, boolean cancelable) {
         ProgressDialogFragment frag = new ProgressDialogFragment();