diff --git a/build/nandfirm/sdmc-launcher/ARM9/main.c b/build/nandfirm/sdmc-launcher/ARM9/main.c
index 3aea4ad1..b6cd06ae 100644
--- a/build/nandfirm/sdmc-launcher/ARM9/main.c
+++ b/build/nandfirm/sdmc-launcher/ARM9/main.c
@@ -22,8 +22,8 @@
 //#define SUPPORT_SRL_SELECT
 
 #ifndef FIRM_USE_TWLSDK_KEYS
-static const u8* rsa_key_user = NULL;   // not acceptable
-static const u8* rsa_key_sys = NULL;    // not acceptable
+static const u8* const rsa_key_user = NULL;   // not acceptable
+static const u8* const rsa_key_sys = NULL;    // not acceptable
 static const u8 rsa_key_secure[128] =
 {
     0xC7, 0x94, 0x50, 0x00, 0x3A, 0xE1, 0x0E, 0x6C, 0xA8, 0xD1, 0xC0, 0x2D, 0x77, 0xB7, 0x6D, 0xBC,
@@ -36,6 +36,7 @@ static const u8 rsa_key_secure[128] =
     0x27, 0x75, 0x2B, 0x04, 0xD7, 0x26, 0xA8, 0x8A, 0x55, 0x2A, 0x76, 0xE5, 0x68, 0x80, 0x57, 0x85
 };
 #else
+#if 0
 static const u8 rsa_key_user[128] =
 {
     0xAC, 0x93, 0xBB,
@@ -48,6 +49,9 @@ static const u8 rsa_key_user[128] =
     0x62, 0x39, 0xFB, 0x10, 0x7E, 0x48, 0x7F, 0xDD, 0x82, 0x38, 0x38, 0x76, 0xB5, 0xCE, 0x21, 0x4B,
     0xC9, 0x6F, 0x31, 0x8D, 0x23, 0x57, 0x3D, 0xB6, 0x6C, 0xEE, 0xC2, 0x0D, 0x11
 };
+#else
+static const u8* const rsa_key_user = NULL;   // not acceptable
+#endif
 static const u8 rsa_key_sys[128] =
 {
         0xe9, 0x9e, 0xa7, 0x9f, 0x59, 0x4d, 0xf4, 0xa7, 0x60, 0x04, 0xbd, 0x47, 0xf2, 0xb3, 0x64, 0xcd,