diff --git a/src/newgrf_engine.cpp b/src/newgrf_engine.cpp
index cd2e01fb5f..12557010c7 100644
--- a/src/newgrf_engine.cpp
+++ b/src/newgrf_engine.cpp
@@ -744,6 +744,7 @@ static uint32_t VehicleGetVariable(Vehicle *v, const VehicleScopeResolver *objec
 			}
 			if (v->vehicle_flags.Test(VehicleFlag::CargoUnloading)) SetBit(modflags, 1);
 			if (v->vehicle_flags.Test(VehicleFlag::BuiltAsPrototype)) SetBit(modflags, 10);
+			if (v->vehicle_flags.Test(VehicleFlag::DrivingBackwards)) SetBit(modflags, 11);
 
 			return variable == 0xFE ? modflags : GB(modflags, 8, 8);
 		}