diff --git a/source/crypto.c b/source/crypto.c
index 3c9c0fb..60958d3 100755
--- a/source/crypto.c
+++ b/source/crypto.c
@@ -327,7 +327,7 @@ __attribute__((aligned(4))) static u8 nandCtr[AES_BLOCK_SIZE];
 static u8 nandSlot;
 static u32 fatStart = 0;
 
-FirmwareSource firmSource;
+FirmwareSource firmSource = FIRMWARE_SYSNAND;
 
 __attribute__((aligned(4))) static const u8 key1s[2][AES_BLOCK_SIZE] = {
     {0x07, 0x29, 0x44, 0x38, 0xF8, 0xC9, 0x75, 0x93, 0xAA, 0x0E, 0x4A, 0xB4, 0xAE, 0x84, 0xC1, 0xD8},
diff --git a/source/firm.c b/source/firm.c
index 1ed58ff..22c55e7 100755
--- a/source/firm.c
+++ b/source/firm.c
@@ -152,6 +152,8 @@ static inline u32 loadFirmFromStorage(FirmwareType firmType)
 
 u32 loadNintendoFirm(FirmwareType *firmType, FirmwareSource nandType, bool loadFromStorage, bool isSafeMode)
 {
+    if(isSdMode && !mountFs(false, false)) error("Failed to mount CTRNAND.");
+
     //Load FIRM from CTRNAND
     u32 firmVersion = firmRead(firm, (u32)*firmType);
 
diff --git a/source/main.c b/source/main.c
index 16eedee..c351065 100644
--- a/source/main.c
+++ b/source/main.c
@@ -112,7 +112,6 @@ void main(int argc, char **argv, u32 magicWord)
     }
     else if(memcmp(launchedPath, u"nand", 8) == 0)
     {
-        firmSource = FIRMWARE_SYSNAND;
         if(!mountFs(false, true)) error("Failed to mount CTRNAND.");
         isSdMode = false;
     }
@@ -321,8 +320,6 @@ boot:
         writeConfig(false);
     }
 
-    if(isSdMode && !mountFs(false, false)) error("Failed to mount CTRNAND.");
-
     bool loadFromStorage = CONFIG(LOADEXTFIRMSANDMODULES);
     u32 firmVersion = loadNintendoFirm(&firmType, firmSource, loadFromStorage, isSafeMode);