diff --git a/src/pathfinder/yapf/yapf_road.cpp b/src/pathfinder/yapf/yapf_road.cpp
index 209b64b52a..82fcba1cf1 100644
--- a/src/pathfinder/yapf/yapf_road.cpp
+++ b/src/pathfinder/yapf/yapf_road.cpp
@@ -470,7 +470,7 @@ public:
 		/* set origin (tile, trackdir) */
 		TileIndex src_tile = v->tile;
 		Trackdir src_td = v->GetVehicleTrackdir();
-		if (!HasTrackdir(GetTrackdirBitsForRoad(src_tile, this->IsTram() ? RTT_TRAM : RTT_ROAD), src_td)) {
+		if (!HasTrackdir(GetTrackdirBitsForRoad(src_tile, Yapf().IsTram() ? RTT_TRAM : RTT_ROAD), src_td)) {
 			/* sometimes the roadveh is not on the road (it resides on non-existing track)
 			 * how should we handle that situation? */
 			return false;