diff --git a/DCCTimerESP.cpp b/DCCTimerESP.cpp
index e57f6af..39824a5 100644
--- a/DCCTimerESP.cpp
+++ b/DCCTimerESP.cpp
@@ -297,7 +297,12 @@ void DCCTimer::DCCEXInrushControlOn(uint8_t pin, int duty, bool inverted) {
 int ADCee::init(uint8_t pin) {
   pinMode(pin, ANALOG);
   adc1_config_width(ADC_WIDTH_BIT_12);
+// Espressif deprecated ADC_ATTEN_DB_11 somewhere between 2.0.9 and 2.0.17
+#ifdef ADC_ATTEN_11db
+  adc1_config_channel_atten(pinToADC1Channel(pin),ADC_ATTEN_11db);
+#else
   adc1_config_channel_atten(pinToADC1Channel(pin),ADC_ATTEN_DB_11);
+#endif
   return adc1_get_raw(pinToADC1Channel(pin));
 }
 int16_t ADCee::ADCmax() {