diff --git a/source/firm.c b/source/firm.c
index 34bb8d8..51f7cec 100755
--- a/source/firm.c
+++ b/source/firm.c
@@ -109,7 +109,7 @@ u32 loadFirm(FirmwareType *firmType, FirmwareSource nandType, bool loadFromStora
     return firmVersion;
 }
 
-u32 patchNativeFirm(u32 firmVersion, FirmwareSource nandType, u32 emuHeader, bool isSdMode, u32 devMode)
+u32 patchNativeFirm(u32 firmVersion, FirmwareSource nandType, u32 emuHeader, bool isA9lhInstalled, bool isSdMode, u32 devMode)
 {
     u8 *arm9Section = (u8 *)firm + firm->section[2].offset,
        *arm11Section1 = (u8 *)firm + firm->section[1].offset;
@@ -145,7 +145,7 @@ u32 patchNativeFirm(u32 firmVersion, FirmwareSource nandType, u32 emuHeader, boo
     if(nandType != FIRMWARE_SYSNAND) ret += patchEmuNand(arm9Section, firm->section[2].size, process9Offset, process9Size, emuHeader, firm->section[2].address);
 
     //Apply FIRM0/1 writes patches on sysNAND to protect A9LH
-    else if(ISA9LH || (ISFIRMLAUNCH && BOOTCFG_A9LH != 0)) ret += patchFirmWrites(process9Offset, process9Size);
+    else if(isA9lhInstalled) ret += patchFirmWrites(process9Offset, process9Size);
 
     //Apply firmlaunch patches
     ret += patchFirmlaunches(process9Offset, process9Size, process9MemAddr, isSdMode);
@@ -165,7 +165,7 @@ u32 patchNativeFirm(u32 firmVersion, FirmwareSource nandType, u32 emuHeader, boo
     //Apply UNITINFO patch
     if(devMode == 2) ret += patchUnitInfoValueSet(arm9Section, firm->section[2].size);
 
-    if(devMode != 0 && ISA9LH)
+    if(devMode != 0 && isA9lhInstalled)
     {
         //ARM11 exception handlers
         u32 codeSetOffset,
diff --git a/source/firm.h b/source/firm.h
index e4192e7..97dd422 100644
--- a/source/firm.h
+++ b/source/firm.h
@@ -25,7 +25,7 @@
 #include "types.h"
 
 u32 loadFirm(FirmwareType *firmType, FirmwareSource nandType, bool loadFromStorage, bool isSdMode);
-u32 patchNativeFirm(u32 firmVersion, FirmwareSource nandType, u32 emuHeader, bool isSdMode, u32 devMode);
+u32 patchNativeFirm(u32 firmVersion, FirmwareSource nandType, u32 emuHeader, bool isA9lhInstalled, bool isSdMode, u32 devMode);
 u32 patchTwlFirm(u32 firmVersion, u32 devMode);
 u32 patchAgbFirm(u32 devMode);
 u32 patch1x2xNativeAndSafeFirm(u32 devMode);
diff --git a/source/main.c b/source/main.c
index 992820e..0db90b0 100644
--- a/source/main.c
+++ b/source/main.c
@@ -36,6 +36,7 @@ extern FirmwareSource firmSource;
 
 void main(void)
 {
+    bool isA9lhInstalled;
     u32 configTemp,
         emuHeader;
     FirmwareType firmType;
@@ -65,6 +66,7 @@ void main(void)
 
         nandType = (FirmwareSource)BOOTCFG_NAND;
         firmSource = (FirmwareSource)BOOTCFG_FIRM;
+        isA9lhInstalled = BOOTCFG_A9LH != 0;
     }
     else
     {
@@ -75,6 +77,7 @@ void main(void)
         }
 
         firmType = NATIVE_FIRM;
+        isA9lhInstalled = ISA9LH;
 
         //Get pressed buttons
         u32 pressed = HID_PAD;
@@ -231,11 +234,11 @@ void main(void)
     switch(firmType)
     {
         case NATIVE_FIRM:
-            res = patchNativeFirm(firmVersion, nandType, emuHeader, isSdMode, devMode);
+            res = patchNativeFirm(firmVersion, nandType, emuHeader, isA9lhInstalled, isSdMode, devMode);
             break;
         case SAFE_FIRM:
         case NATIVE_FIRM1X2X:
-            res = ISA9LH ? patch1x2xNativeAndSafeFirm(devMode) : 0;
+            res = isA9lhInstalled ? patch1x2xNativeAndSafeFirm(devMode) : 0;
             break;
         case TWL_FIRM:
             res = patchTwlFirm(firmVersion, devMode);