diff --git a/sketches/doorbell-touch-esp32-32e/DoorbellLogic.h b/sketches/doorbell-touch-esp32-32e/DoorbellLogic.h
index 4f5c0b4..26369bb 100644
--- a/sketches/doorbell-touch-esp32-32e/DoorbellLogic.h
+++ b/sketches/doorbell-touch-esp32-32e/DoorbellLogic.h
@@ -54,9 +54,9 @@ private:
   String        _pendStatusState;
   String        _pendStatusMsg;
 
-  // NTP
+  // NTP — pointer because NTPClient has no default constructor
   WiFiUDP       _ntpUDP;
-  NTPClient     _timeClient     = nullptr;
+  NTPClient*    _timeClient     = nullptr;
   bool          _ntpSynced      = false;
   time_t        _lastEpoch      = 0;