diff --git a/Systems/a320-lights.xml b/Systems/a320-lights.xml
index 0e49b5ae..b4f01878 100644
--- a/Systems/a320-lights.xml
+++ b/Systems/a320-lights.xml
@@ -146,7 +146,7 @@
 					/systems/electrical/bus/ac-2 ge 110
 				</test>
 				<test logic="OR">
-					/controls/flight/slats-cmd ge 0
+					fcs/flap-pos-deg ge 15
 					/gear/gear[2]/wow eq 1
 				</test>
 			</test>