diff --git a/src/Scripting/NasalPositioned.cxx b/src/Scripting/NasalPositioned.cxx
index fd74da46e..231479b4b 100644
--- a/src/Scripting/NasalPositioned.cxx
+++ b/src/Scripting/NasalPositioned.cxx
@@ -3275,6 +3275,8 @@ naRef initNasalPositioned(naRef globals, naContext c)
     hashset(c, flightplanPrototype, "currentWP", naNewFunc(c, naNewCCode(c, f_flightplan_currentWP)));
     hashset(c, flightplanPrototype, "nextWP", naNewFunc(c, naNewCCode(c, f_flightplan_nextWP)));
     hashset(c, flightplanPrototype, "getPlanSize", naNewFunc(c, naNewCCode(c, f_flightplan_numWaypoints)));
+    // alias to this name also
+    hashset(c, flightplanPrototype, "numWaypoints", naNewFunc(c, naNewCCode(c, f_flightplan_numWaypoints)));
     hashset(c, flightplanPrototype, "appendWP", naNewFunc(c, naNewCCode(c, f_flightplan_appendWP)));
     hashset(c, flightplanPrototype, "insertWP", naNewFunc(c, naNewCCode(c, f_flightplan_insertWP)));
     hashset(c, flightplanPrototype, "deleteWP", naNewFunc(c, naNewCCode(c, f_flightplan_deleteWP)));