diff --git a/Nasal/FMGC/SimbriefParser.nas b/Nasal/FMGC/SimbriefParser.nas
index 8fa4136f..6312b49c 100644
--- a/Nasal/FMGC/SimbriefParser.nas
+++ b/Nasal/FMGC/SimbriefParser.nas
@@ -270,7 +270,7 @@ var SimbriefParser = {
 		fmgc.FMGCInternal.costIndex = me.OFP.getNode("general/costindex").getValue();
 		fmgc.FMGCInternal.costIndexSet = 1;
 		fmgc.FMGCNodes.costIndex.setValue(fmgc.FMGCInternal.costIndex);
-		fmgc.FMGCInternal.tropo = me.OFP.getNode("general/avg_tropopause").getValue();
+		fmgc.FMGCInternal.tropo = math.round(me.OFP.getNode("general/avg_tropopause").getValue(), 10);
 		fmgc.FMGCInternal.tropoSet = 1;
 		
 		# Set cruise altitude