diff --git a/src/roadveh_cmd.cpp b/src/roadveh_cmd.cpp
--- a/src/roadveh_cmd.cpp
+++ b/src/roadveh_cmd.cpp
@@ -1160,7 +1160,7 @@ static Trackdir FollowPreviousRoadVehicl
 static bool CanBuildTramTrackOnTile(CompanyID c, TileIndex t, RoadBits r)
 {
 	/* The 'current' company is not necessarily the owner of the vehicle. */
-	Backup<CompanyByte> cur_company(_current_company, c);
+	Backup<CompanyByte> cur_company(_current_company, c, FILE_LINE);
 
 	CommandCost ret = DoCommand(t, ROADTYPE_TRAM << 4 | r, 0, DC_NONE, CMD_BUILD_ROAD);