diff --git a/source/types.h b/source/types.h
index 661c06d..703c34d 100644
--- a/source/types.h
+++ b/source/types.h
@@ -47,16 +47,14 @@ typedef volatile s64 vs64;
 
 #include "3dsheaders.h"
 
-#define ARM11_CORE0_MAILBOX_ENTRYPOINT ((vu32 *)0x1FFFFFFC)
-
 #define CFG_BOOTENV         (*(vu32 *)0x10010000)
 #define CFG_UNITINFO        (*(vu8  *)0x10010010)
 #define CFG_TWLUNITINFO     (*(vu8  *)0x10010014)
 #define OTP_DEVCONSOLEID    (*(vu64 *)0x10012000)
 #define OTP_TWLCONSOLEID    (*(vu64 *)0x10012100)
-#define PDN_MPCORE_CFG      (*(vu32 *)0x10140FFC)
+#define CFG11_SOCINFO       (*(vu32 *)0x10140FFC)
 
-#define ISN3DS       (PDN_MPCORE_CFG == 7)
+#define ISN3DS       (CFG11_SOCINFO & 2)
 #define ISDEVUNIT    (CFG_UNITINFO != 0)
 
 typedef struct __attribute__((packed))