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-rw-r--r--src/newgrf_engine.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/newgrf_engine.cpp b/src/newgrf_engine.cpp
index cdd62b7ae..0b23aad90 100644
--- a/src/newgrf_engine.cpp
+++ b/src/newgrf_engine.cpp
@@ -567,7 +567,7 @@ static uint32 VehicleGetVariable(Vehicle *v, const VehicleScopeResolver *object,
{
const Vehicle *w = v->Next();
- uint16 altitude = v->z_pos - w->z_pos; // Aircraft height - shadow height
+ uint16 altitude = ClampToU16(v->z_pos - w->z_pos); // Aircraft height - shadow height
byte airporttype = ATP_TTDP_LARGE;
const Station *st = GetTargetAirportIfValid(Aircraft::From(v));