diff --git a/src/current_sense/hardware_specific/esp32/esp32_adc_driver.cpp b/src/current_sense/hardware_specific/esp32/esp32_adc_driver.cpp
index 9cd1b34e..57ffdfb5 100644
--- a/src/current_sense/hardware_specific/esp32/esp32_adc_driver.cpp
+++ b/src/current_sense/hardware_specific/esp32/esp32_adc_driver.cpp
@@ -154,9 +154,8 @@ bool IRAM_ATTR __adcStart(uint8_t pin){
     }
 
     if(channel > 9){
-        channel -= 10;
         CLEAR_PERI_REG_MASK(SENS_SAR_MEAS_START2_REG, SENS_MEAS2_START_SAR_M);
-        SET_PERI_REG_BITS(SENS_SAR_MEAS_START2_REG, SENS_SAR2_EN_PAD, (1 << channel), SENS_SAR2_EN_PAD_S);
+        SET_PERI_REG_BITS(SENS_SAR_MEAS_START2_REG, SENS_SAR2_EN_PAD, (1 << (channel - 10)), SENS_SAR2_EN_PAD_S);
         SET_PERI_REG_MASK(SENS_SAR_MEAS_START2_REG, SENS_MEAS2_START_SAR_M);
     } else {
         CLEAR_PERI_REG_MASK(SENS_SAR_MEAS_START1_REG, SENS_MEAS1_START_SAR_M);
@@ -225,9 +224,8 @@ uint16_t IRAM_ATTR adcRead(uint8_t pin)
     __analogInit();
 
     if(channel > 9){
-        channel -= 10;
         CLEAR_PERI_REG_MASK(SENS_SAR_MEAS_START2_REG, SENS_MEAS2_START_SAR_M);
-        SET_PERI_REG_BITS(SENS_SAR_MEAS_START2_REG, SENS_SAR2_EN_PAD, (1 << channel), SENS_SAR2_EN_PAD_S);
+        SET_PERI_REG_BITS(SENS_SAR_MEAS_START2_REG, SENS_SAR2_EN_PAD, (1 << (channel - 10)), SENS_SAR2_EN_PAD_S);
         SET_PERI_REG_MASK(SENS_SAR_MEAS_START2_REG, SENS_MEAS2_START_SAR_M);
     } else {
         CLEAR_PERI_REG_MASK(SENS_SAR_MEAS_START1_REG, SENS_MEAS1_START_SAR_M);
@@ -257,4 +255,4 @@ uint16_t IRAM_ATTR adcRead(uint8_t pin)
 }
 
 
-#endif
\ No newline at end of file
+#endif