diff --git a/libraries/AP_Scripting/applets/Aerobatics/FixedWing/plane_aerobatics.lua b/libraries/AP_Scripting/applets/Aerobatics/FixedWing/plane_aerobatics.lua
index 2bb2c7f4e6a865..50da4616dd9d74 100644
--- a/libraries/AP_Scripting/applets/Aerobatics/FixedWing/plane_aerobatics.lua
+++ b/libraries/AP_Scripting/applets/Aerobatics/FixedWing/plane_aerobatics.lua
@@ -2717,8 +2717,10 @@ function do_path()
                    lookahead_bf_dps:y(),
                    path_rate_bf_dps:z(),
                    lookahead_bf_dps:z())
-      path_rate_bf_dps:y(lookahead_bf_dps:y())
-      path_rate_bf_dps:z(lookahead_bf_dps:z())
+      if not Vec3IsNaN(lookahead_bf_dps) then
+         path_rate_bf_dps:y(lookahead_bf_dps:y())
+         path_rate_bf_dps:z(lookahead_bf_dps:z())
+      end
    end
    
    --[[