diff --git a/UefiCpuPkg/CpuDxe/Ia32/MpAsm.asm b/UefiCpuPkg/CpuDxe/Ia32/MpAsm.asm
index d476829b91..09579f251e 100644
--- a/UefiCpuPkg/CpuDxe/Ia32/MpAsm.asm
+++ b/UefiCpuPkg/CpuDxe/Ia32/MpAsm.asm
@@ -11,7 +11,8 @@
 ;
 ;------------------------------------------------------------------------------
 
-.586p
+.686
+.xmm
 .model flat, C
 
 extern mTopOfApCommonStack:DWORD