diff --git a/ampel-firmware/ampel-firmware.ino b/ampel-firmware/ampel-firmware.ino
index 8d04504665e014bd52e1d66f38c0e14864d2fc9e..4d3ba2e1a884dd93ebdd41e79cf91b915c9fb982 100644
--- a/ampel-firmware/ampel-firmware.ino
+++ b/ampel-firmware/ampel-firmware.ino
@@ -56,17 +56,6 @@
  * and define your credentials and parameters in 'config.h'.
  */
 
-/*****************************************************************
- * PreInit                                                       *
- *****************************************************************/
-void preinit() {
-#if !defined(AMPEL_WIFI) && defined(ESP8266)
-  // WiFi would be initialized otherwise (on ESP8266), even if unused.
-  // see https://github.com/esp8266/Arduino/issues/2111#issuecomment-224251391
-  ESP8266WiFiClass::preinitWiFiOff();
-#endif
-}
-
 /*****************************************************************
  * Setup                                                         *
  *****************************************************************/
@@ -132,7 +121,6 @@ void checkSerialInput();
 /*****************************************************************
  * Main loop                                                     *
  *****************************************************************/
-
 void loop() {
 #if defined(AMPEL_LORAWAN) && defined(ESP32)
   //LMIC Library seems to be very sensitive to timing issues, so run it first.
diff --git a/ampel-firmware/util.cpp b/ampel-firmware/util.cpp
index 841b08ff3a6b04d2dde6e39094d38c601f7d2e72..5fcb36cb454c42b606fd632e7db9be5faf9108b8 100644
--- a/ampel-firmware/util.cpp
+++ b/ampel-firmware/util.cpp
@@ -7,6 +7,13 @@ namespace config {
 
 #if defined(ESP8266)
 const char *current_board = "ESP8266";
+#  if !defined(AMPEL_WIFI)
+void preinit() {
+  // WiFi would be initialized otherwise (on ESP8266), even if unused.
+  // see https://github.com/esp8266/Arduino/issues/2111#issuecomment-224251391
+  ESP8266WiFiClass::preinitWiFiOff();
+}
+#  endif
 #elif defined(ESP32)
 const char *current_board = "ESP32";
 #else