diff --git a/src/com/android/settings/network/PrivateDnsModeDialogPreference.java b/src/com/android/settings/network/PrivateDnsModeDialogPreference.java
index bdadfe4..4878f31 100644
--- a/src/com/android/settings/network/PrivateDnsModeDialogPreference.java
+++ b/src/com/android/settings/network/PrivateDnsModeDialogPreference.java
@@ -28,7 +28,6 @@
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
-import android.net.NetworkUtils;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.provider.Settings;
@@ -56,6 +55,8 @@
 import com.android.settingslib.RestrictedLockUtils;
 import com.android.settingslib.RestrictedLockUtilsInternal;
 
+import com.google.common.net.InternetDomainName;
+
 import java.util.HashMap;
 import java.util.Map;
 
@@ -278,7 +279,7 @@
         final Button saveButton = getSaveButton();
         if (saveButton != null) {
             saveButton.setEnabled(modeProvider
-                    ? NetworkUtils.isWeaklyValidatedHostname(mEditText.getText().toString())
+                    ? InternetDomainName.isValid(mEditText.getText().toString())
                     : true);
         }
     }