diff --git a/flix/control.ino b/flix/control.ino
index 8d7b55f..dd02bbb 100644
--- a/flix/control.ino
+++ b/flix/control.ino
@@ -72,7 +72,8 @@ void control() {
 }
 
 void interpretRC() {
-	armed = controls[throttleChannel] >= 0.05 && controls[armedChannel] >= 0.5;
+	armed = controls[throttleChannel] >= 0.05 &&
+		(controls[armedChannel] >= 0.5 || isnan(controls[armedChannel])); // assume armed if armed channel is not defined
 
 	// NOTE: put ACRO or MANUAL modes there if you want to use them
 	if (controls[modeChannel] < 0.25) {