diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c
index 1a6cdb678e..cdc03113e5 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
@@ -1502,7 +1502,7 @@ MpInitLibInitialize (
   //
   // Set BSP basic information
   //
-  InitializeApData (CpuMpData, 0, 0, CpuMpData->Buffer);
+  InitializeApData (CpuMpData, 0, 0, CpuMpData->Buffer + ApStackSize);
   //
   // Save assembly code information
   //