diff --git a/src/fceu.h b/src/fceu.h
index 4825307..1b398db 100644
--- a/src/fceu.h
+++ b/src/fceu.h
@@ -105,13 +105,13 @@ extern uint8 Exit;
 extern uint8 pale;
 extern uint8 vsdip;
 
-#define JOY_A   1
-#define JOY_B   2
-#define JOY_SELECT      4
-#define JOY_START       8
-#define JOY_UP  0x10
-#define JOY_DOWN  0x20
-#define JOY_LEFT  0x40
-#define JOY_RIGHT       0x80
+#define JOY_A        0x01
+#define JOY_B        0x02
+#define JOY_SELECT   0x04
+#define JOY_START    0x08
+#define JOY_UP       0x10
+#define JOY_DOWN     0x20
+#define JOY_LEFT     0x40
+#define JOY_RIGHT    0x80
 
 #endif