diff --git a/lib_planes/entities.lua b/lib_planes/entities.lua
index d4a08a8..1ccdf0d 100644
--- a/lib_planes/entities.lua
+++ b/lib_planes/entities.lua
@@ -262,6 +262,9 @@ function airutils.logic(self)
         self._custom_step_additional_function(self)
     end
 
+    --fix for old planes on map
+    if not self._wing_angle_of_attack then self._wing_angle_of_attack = 2 end
+
     if self._wing_configuration == self._wing_angle_of_attack and self._flap then
         airutils.flap_on(self)
     end