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-rw-r--r--include/gba/types.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/gba/types.h b/include/gba/types.h
index cb370c785..9f2594703 100644
--- a/include/gba/types.h
+++ b/include/gba/types.h
@@ -107,8 +107,8 @@ struct OamData
#define SPRITE_SIZE_16x32 ((ST_OAM_SIZE_2 << 2) | (ST_OAM_V_RECTANGLE))
#define SPRITE_SIZE_32x64 ((ST_OAM_SIZE_3 << 2) | (ST_OAM_V_RECTANGLE))
-#define SPRITE_SIZE(dim) (SPRITE_SIZE_##dim >> 2)
-#define SPRITE_SHAPE(dim) (SPRITE_SIZE_##dim & 0xFF)
+#define SPRITE_SIZE(dim) ((SPRITE_SIZE_##dim >> 2) & 0x03)
+#define SPRITE_SHAPE(dim) (SPRITE_SIZE_##dim & 0x03)
struct BgAffineSrcData
{