diff --git a/lwcpu/src/lib.rs b/lwcpu/src/lib.rs
index bb8ec10..b1a3481 100644
--- a/lwcpu/src/lib.rs
+++ b/lwcpu/src/lib.rs
@@ -153,14 +153,14 @@ impl RNG {
 
 pub struct Buttons {}
 impl Buttons {
-    pub const RIGHT_RIGHT : u8 = 0b00000001;
-    pub const RIGHT_DOWN  : u8 = 0b00000010;
-    pub const RIGHT_LEFT  : u8 = 0b00000100;
-    pub const RIGHT_UP    : u8 = 0b00001000;
-    pub const LEFT_RIGHT  : u8 = 0b00010000;
-    pub const LEFT_DOWN   : u8 = 0b00100000;
-    pub const LEFT_LEFT   : u8 = 0b01000000;
-    pub const LEFT_UP     : u8 = 0b10000000;
+    pub const A     : u8 = 0b00000001;
+    pub const B     : u8 = 0b00000010;
+    pub const X     : u8 = 0b00000100;
+    pub const Y     : u8 = 0b00001000;
+    pub const RIGHT : u8 = 0b00010000;
+    pub const DOWN  : u8 = 0b00100000;
+    pub const LEFT  : u8 = 0b01000000;
+    pub const UP    : u8 = 0b10000000;
 
     #[inline]
     pub fn read() -> u8 {