diff --git a/include/gba/io_reg.h b/include/gba/io_reg.h
index 2dda7b5ac..93a5027eb 100644
--- a/include/gba/io_reg.h
+++ b/include/gba/io_reg.h
@@ -693,7 +693,7 @@
 #define R_BUTTON        0x0100
 #define L_BUTTON        0x0200
 #define KEYS_MASK       0x03FF
-#define KEY_INTR_ENABLE 0x0400
+#define KEY_INTR_ENABLE 0x4000
 #define KEY_OR_INTR     0x0000
 #define KEY_AND_INTR    0x8000
 #define DPAD_ANY        0x00F0