diff --git a/ampel-firmware/co2_sensor.cpp b/ampel-firmware/co2_sensor.cpp
index 20878af8d0ecd1a78dba6879fea7731917c230f1..0420890c1deedc6f0c31b3b36d2b75bf5f39a9c1 100644
--- a/ampel-firmware/co2_sensor.cpp
+++ b/ampel-firmware/co2_sensor.cpp
@@ -133,7 +133,7 @@ namespace sensor {
     }
     /**
      * Display data, even if it's "old" (with breathing).
-     * A short delay is required in order to not overwhelm controller.
+     * A short delay is required in order to let background tasks run on the ESP8266.
      * see https://github.com/esp8266/Arduino/issues/3241#issuecomment-301290392
      */
     if (co2 < 2000) {