GRID_REAL_HEIGHT), \
MAX_GRID_YSIZE)
-#define DEFAULT_GRID_XSIZE(n) (n == 0 ? DEFAULT_GRID_XSIZE_0 : \
+#define DEFAULT_GRID_XSIZE(n) ((n) == 0 ? DEFAULT_GRID_XSIZE_0 : \
DEFAULT_GRID_XSIZE_1)
-#define DEFAULT_GRID_YSIZE(n) (n == 0 ? DEFAULT_GRID_YSIZE_0 : \
+#define DEFAULT_GRID_YSIZE(n) ((n) == 0 ? DEFAULT_GRID_YSIZE_0 : \
DEFAULT_GRID_YSIZE_1)
#define GRID_ACTIVE_NR() (video.screen_width > \