diff --git a/src/com/android/settings/ConfirmDeviceCredentialBaseActivity.java b/src/com/android/settings/ConfirmDeviceCredentialBaseActivity.java
index 176efbc6a48..3da1766d8bb 100644
--- a/src/com/android/settings/ConfirmDeviceCredentialBaseActivity.java
+++ b/src/com/android/settings/ConfirmDeviceCredentialBaseActivity.java
@@ -36,6 +36,7 @@ public abstract class ConfirmDeviceCredentialBaseActivity extends SettingsActivi
             mDark = true;
         }
         super.onCreate(savedState);
+        getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
         boolean deviceLocked = getSystemService(KeyguardManager.class).isKeyguardLocked();
         if (deviceLocked && getIntent().getBooleanExtra(
                 ConfirmDeviceCredentialBaseFragment.SHOW_WHEN_LOCKED, false)) {