diff --git a/src/com/android/settings/ConfirmDeviceCredentialBaseActivity.java b/src/com/android/settings/ConfirmDeviceCredentialBaseActivity.java
index d488d7a..3580fcf 100644
--- a/src/com/android/settings/ConfirmDeviceCredentialBaseActivity.java
+++ b/src/com/android/settings/ConfirmDeviceCredentialBaseActivity.java
@@ -45,6 +45,7 @@
             mDark = true;
         }
         super.onCreate(savedState);
+        getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
         mIsKeyguardLocked = savedState == null
                 ? getSystemService(KeyguardManager.class).isKeyguardLocked()
                 : savedState.getBoolean(STATE_IS_KEYGUARD_LOCKED, false);