diff --git a/dock_gui.c b/dock_gui.c
index aa51caeb0d..6f3c556d0e 100644
--- a/dock_gui.c
+++ b/dock_gui.c
@@ -233,11 +233,7 @@ static void BuildDockStationWndProc(Window *w, WindowEvent *e)
 
 		rad = (_patches.modified_catchment) ? CA_DOCK : 4;
 
-		if (_station_show_coverage) {
-			SetTileSelectBigSize(-rad, -rad, 2 * rad, 2 * rad);
-		} else {
-			SetTileSelectBigSize(0, 0, 0, 0);
-		}
+		if (_station_show_coverage) SetTileSelectBigSize(-rad, -rad, 2 * rad, 2 * rad);
 
 		DrawStationCoverageAreaText(4, 50, (uint)-1, rad);
 		break;
diff --git a/viewport.c b/viewport.c
index 1f522ab7ad..f6ff534f79 100644
--- a/viewport.c
+++ b/viewport.c
@@ -1894,7 +1894,9 @@ void UpdateTileSelection(void)
 	// redraw selection
 	if (_thd.drawstyle != _thd.new_drawstyle ||
 			_thd.pos.x != _thd.new_pos.x || _thd.pos.y != _thd.new_pos.y ||
-			_thd.size.x != _thd.new_size.x || _thd.size.y != _thd.new_size.y) {
+			_thd.size.x != _thd.new_size.x || _thd.size.y != _thd.new_size.y ||
+	    _thd.outersize.x != _thd.new_outersize.x ||
+	    _thd.outersize.y != _thd.new_outersize.y) {
 		// clear the old selection?
 		if (_thd.drawstyle) SetSelectionTilesDirty();