diff --git a/firmware/firmware.ino b/firmware/firmware.ino
index 9924c8c..ac2b66a 100644
--- a/firmware/firmware.ino
+++ b/firmware/firmware.ino
@@ -284,6 +284,7 @@ void processLockState()
 			if (lockArmedTimeoutCount > LOCK_ARMED_TIMEOUT) {
 				if (LOGGING) Serial.println("[INFO] Arming timed out, disarming.");
 				lockState = LOCK_OFF;
+				LEDState = LED_ERROR;
 			}
 			break;
 		case LOCK_ON_PRESSED: