diff --git a/ESP32AnalogRead.cpp b/ESP32AnalogRead.cpp
index a7e89db..c66715f 100644
--- a/ESP32AnalogRead.cpp
+++ b/ESP32AnalogRead.cpp
@@ -573,7 +573,6 @@ uint16_t ESP32AnalogRead::readRaw()
 #endif
 
 	int32_t raw = 0;
-	uint32_t voltage = 0;
 	// Read ADC and obtain result in mV
 	if (unit == ADC_UNIT_1)
 	{
@@ -659,4 +658,4 @@ uint16_t ESP32AnalogRead::readRaw()
 	}
 	return raw;
 #endif
-}
\ No newline at end of file
+}