diff --git a/build/libraries_sysmenu/sysmenu/ARM9/src/title.c b/build/libraries_sysmenu/sysmenu/ARM9/src/title.c
index 21beb160..62d42c28 100644
--- a/build/libraries_sysmenu/sysmenu/ARM9/src/title.c
+++ b/build/libraries_sysmenu/sysmenu/ARM9/src/title.c
@@ -841,7 +841,8 @@ OS_TPrintf("RebootSystem failed: cant read file(%p, %d, %d, %d)\n", &s_authcode,
 		}
 		
 		// ヘッダのハッシュ計算
-		SVC_CalcSHA1( s_calc_hash, header, (u32)( isTwlApp ? TWL_ROM_HEADER_HASH_CALC_DATA_LEN : NTR_ROM_HEADER_HASH_CALC_DATA_LEN ));
+		SVC_CalcSHA1( s_calc_hash, header, (u32)( ( isTwlApp || ( pBootTitle->flags.bootType == LAUNCHER_BOOTTYPE_NAND ) ) ?
+												TWL_ROM_HEADER_HASH_CALC_DATA_LEN : NTR_ROM_HEADER_HASH_CALC_DATA_LEN ));
 		
 		//この時点でヘッダの正当性検証
 		// ※ROMヘッダ認証