diff --git a/Nasal/MCDU/F-PLN.nas b/Nasal/MCDU/F-PLN.nas
index d535912b..356c292a 100644
--- a/Nasal/MCDU/F-PLN.nas
+++ b/Nasal/MCDU/F-PLN.nas
@@ -94,7 +94,7 @@ var fplnItem = {
 		return sprintf("%03.0f", math.round(me.trk));
 	},
 	getSpd: func() {
-		if (me.index == 0 and fmgc.FMGCInternal.v1) {
+		if (me.index == 0 and fmgc.FMGCInternal.v1set) {
 			return [sprintf("%3.0f", math.round(fmgc.FMGCInternal.v1)), "mag"];
 		} elsif (me.wp.speed_cstr != nil and me.wp.speed_cstr != 0) {
 			return [sprintf("%3.0f", me.wp.speed_cstr), "mag"];