diff --git a/spybug/spybug.ino b/spybug/spybug.ino
index 30d6ee7..df45b1a 100644
--- a/spybug/spybug.ino
+++ b/spybug/spybug.ino
@@ -130,7 +130,7 @@ ISR (WDT_vect) {
 /* Based on https://github.com/rocketscream/Low-Power. */
 static void low_power_sleep_minutes(unsigned long t) {
 	wdt_int_sleep_mode = true;
-	ADCSRA &= ~(1 << ADEN); /* Disable ADC. */
+	ADCSRA &= ~_BV(ADEN); /* Disable ADC. */
 	for (unsigned long i = 0; 8ul * i < 60ul * t; i++) {
 		// Power Down for 8s
 		wdt_enable(WDTO_8S);   /* Start watchdog timer for 8s. */
@@ -146,7 +146,7 @@ static void low_power_sleep_minutes(unsigned long t) {
 			sei();
 		} while (0);
 	}
-	ADCSRA |= (1 << ADEN); /* Re-enable ADC. */
+	ADCSRA |= _BV(ADEN); /* Re-enable ADC. */
 	wdt_int_sleep_mode = false;
 }