diff --git a/lib/libesp32/ESP32-to-ESP8266-compat/src/esp8266toEsp32.h b/lib/libesp32/ESP32-to-ESP8266-compat/src/esp8266toEsp32.h
index 25f6f539b..2555b0808 100644
--- a/lib/libesp32/ESP32-to-ESP8266-compat/src/esp8266toEsp32.h
+++ b/lib/libesp32/ESP32-to-ESP8266-compat/src/esp8266toEsp32.h
@@ -89,6 +89,7 @@ inline void analogAttach(uint32_t pin, uint32_t channel) {
 inline void analogWrite(uint8_t pin, int val)
 {
   uint32_t channel = _analog_pin2chan(pin);
+  if ( val >> (_pwm_bit_num-1) ) ++val;
   ledcWrite(channel + PWM_CHANNEL_OFFSET, val);
 //  Serial.printf("write %d - %d\n",channel,val);
 }