diff --git a/Moose Development/Moose/Core/Zone.lua b/Moose Development/Moose/Core/Zone.lua
index 5d88d833e..80c94bdf0 100644
--- a/Moose Development/Moose/Core/Zone.lua	
+++ b/Moose Development/Moose/Core/Zone.lua	
@@ -174,6 +174,7 @@ end
 -- @param DCS#Vec3 Vec3 The point to test.
 -- @return #boolean true if the Vec3 is within the zone.
 function ZONE_BASE:IsVec3InZone( Vec3 )
+  if not Vec3 then return false end
   local InZone = self:IsVec2InZone( { x = Vec3.x, y = Vec3.z } )
   return InZone
 end