diff --git a/ampel-firmware/util.cpp b/ampel-firmware/util.cpp
index 73f53766a47e5da2a2d079ed64eed019cd8bad5e..8d8fb6addd73a7dff41c1edf431b50af37724973 100644
--- a/ampel-firmware/util.cpp
+++ b/ampel-firmware/util.cpp
@@ -1,4 +1,9 @@
 #include "util.h"
+#include "sensor_console.h"
+#include "config.h"
+#include "sensor_console.h"
+#include <WiFiUdp.h> // required for NTP
+#include "src/lib/NTPClient-master/NTPClient.h" // NTP
 
 namespace config {
   const char *ntp_server = NTP_SERVER;
diff --git a/ampel-firmware/util.h b/ampel-firmware/util.h
index 5d13bae02394ca2db91a319e0d8d7aaf3eac0612..d37dacd344d4af2f0d95d5919ffbdf79066615ba 100644
--- a/ampel-firmware/util.h
+++ b/ampel-firmware/util.h
@@ -1,11 +1,5 @@
 #ifndef AMPEL_UTIL_H_INCLUDED
 #define AMPEL_UTIL_H_INCLUDED
-#include <Arduino.h>
-#include "config.h"
-#include "sensor_console.h"
-
-#include <WiFiUdp.h> // required for NTP
-#include "src/lib/NTPClient-master/NTPClient.h" // NTP
 
 #if defined(ESP8266)
 #  include <ESP8266WiFi.h> // required to get MAC address