diff --git a/include/gba/io_reg.h b/include/gba/io_reg.h
index 53b60d5b6..a8a36f7e2 100644
--- a/include/gba/io_reg.h
+++ b/include/gba/io_reg.h
@@ -706,7 +706,7 @@
 #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