diff --git a/Nasal/startup.nas b/Nasal/startup.nas
index 3502ad93c..3d7cff973 100644
--- a/Nasal/startup.nas
+++ b/Nasal/startup.nas
@@ -1,5 +1,5 @@
 var set_runway_from_metar_wind = func {
-	if (!getprop("/environment/metar/real-metar"))
+	if (!getprop("/environment/params/real-world-weather-fetch"))
 		return printlog("info", "metar-rwy: no live weather");
 	if (!getprop("/sim/startup/options/airport"))
 		return printlog("info", "metar-rwy: no airport requested");