diff --git a/src/main.cpp b/src/main.cpp
index 53b592c..7009ca5 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -5,6 +5,7 @@
 #include "mode/Mode.h"
 #include "display/Display.h"
 #include <WebServer.h>
+#include <esp_sntp.h>
 
 #include "mode/GameOfLife/GameOfLife.h"
 #include "mode/Pong/Pong.h"
@@ -162,6 +163,10 @@ void loop() {
   mode_step();
 }
 
+void timeSyncCallback(struct timeval *tv) {
+  Serial.printf("timeSyncCallback: %ld\n", tv->tv_sec);
+}
+
 void wifi_loop() {
   bool hasIp = (uint32_t) WiFi.localIP() != 0;
   if (!connected) {