diff --git a/src/waypoint.cpp b/src/waypoint.cpp
--- a/src/waypoint.cpp
+++ b/src/waypoint.cpp
@@ -249,6 +249,7 @@ CommandCost CmdBuildTrainWaypoint(TileIn
 
 			RedrawWaypointSign(wp);
 			wp->xy = tile;
+			InvalidateWindowData(WC_WAYPOINT_VIEW, wp->index);
 		}
 
 		const StationSpec* statspec;