--- flightgear-2020.3.11/src/Navaids/PositionedOctree.cxx.orig	2021-11-01 09:55:26.210454089 +0000
+++ flightgear-2020.3.11/src/Navaids/PositionedOctree.cxx	2021-11-01 09:46:03.555750391 +0000
@@ -148,7 +148,7 @@
 
 void Leaf::insertChild(FGPositioned::Type ty, PositionedID id)
 {
-  assert(childrenLoaded);
+  assert(_childrenLoaded);
   children.insert(children.end(), TypedPositioned(ty, id));
 }