diff --git a/Source/Project64-core/N64System/Mips/Disk.cpp b/Source/Project64-core/N64System/Mips/Disk.cpp
index f41b4698a..783a6f992 100644
--- a/Source/Project64-core/N64System/Mips/Disk.cpp
+++ b/Source/Project64-core/N64System/Mips/Disk.cpp
@@ -201,7 +201,7 @@ void DiskBMUpdate()
     else
     {
         //Read Data
-        if (((g_Reg->ASIC_CUR_TK >> 16) & 0xFFF) == 6 && g_Reg->ASIC_CUR_SECTOR == 0)
+        if (((g_Reg->ASIC_CUR_TK >> 16) & 0x1FFF) == 6 && g_Reg->ASIC_CUR_SECTOR == 0)
         {
             g_Reg->ASIC_STATUS &= ~DD_STATUS_DATA_RQ;
             g_Reg->ASIC_BM_STATUS |= DD_BM_STATUS_MICRO;