diff --git a/esphome/components/bl0940/sensor.py b/esphome/components/bl0940/sensor.py
index f36250ecdfa..992064943b8 100644
--- a/esphome/components/bl0940/sensor.py
+++ b/esphome/components/bl0940/sensor.py
@@ -126,7 +126,7 @@ def set_reference_values(config):
         config.setdefault(CONF_POWER_REFERENCE, DEFAULT_BL0940_LEGACY_PREF)
         config.setdefault(CONF_ENERGY_REFERENCE, DEFAULT_BL0940_LEGACY_EREF)
     else:
-        vref = config.get(CONF_VOLTAGE_REFERENCE, DEFAULT_BL0940_VREF)
+        vref = config.get(CONF_REFERENCE_VOLTAGE, DEFAULT_BL0940_VREF)
         r_one = config.get(CONF_RESISTOR_ONE, DEFAULT_BL0940_R1)
         r_two = config.get(CONF_RESISTOR_TWO, DEFAULT_BL0940_R2)
         r_shunt = config.get(CONF_RESISTOR_SHUNT, DEFAULT_BL0940_RL)