diff --git a/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm b/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm
index bfc3ff1f5c..6a8794d83b 100644
--- a/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm
+++ b/UefiCpuPkg/Library/MpInitLib/X64/MpFuncs.nasm
@@ -125,7 +125,6 @@ LongModeStart:
     jnz        GetApicId
 
     ; AP init
-    mov        esi, ebx
     mov        edi, esi
     add        edi, LockLocation
     mov        rax, NotVacantFlag