diff --git a/src/road_gui.cpp b/src/road_gui.cpp
index e5d68cb0b3..5d67fb50ac 100644
--- a/src/road_gui.cpp
+++ b/src/road_gui.cpp
@@ -503,8 +503,8 @@ static void BuildRoadToolbWndProc(Window *w, WindowEvent *e)
 				/* For autoroad we need to update the
 				 * direction of the road */
 				if (_thd.size.x > _thd.size.y || (_thd.size.x == _thd.size.y &&
-						(_tile_fract_coords.x < _tile_fract_coords.y && (_tile_fract_coords.x + _tile_fract_coords.y) < 16) ||
-						(_tile_fract_coords.x > _tile_fract_coords.y && (_tile_fract_coords.x + _tile_fract_coords.y) > 16) )) {
+						( (_tile_fract_coords.x < _tile_fract_coords.y && (_tile_fract_coords.x + _tile_fract_coords.y) < 16) ||
+						  (_tile_fract_coords.x > _tile_fract_coords.y && (_tile_fract_coords.x + _tile_fract_coords.y) > 16) ))) {
 					/* Set dir = X */
 					_place_road_flag &= ~RF_DIR_Y;
 				} else {