diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.h b/UefiCpuPkg/Library/MpInitLib/MpLib.h
index 179f8e585b..11e0d2661f 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.h
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.h
@@ -357,7 +357,8 @@ typedef
   IN UINTN    StackStart
   );

-extern EFI_GUID  mCpuInitMpLibHobGuid;
+extern EFI_GUID         mCpuInitMpLibHobGuid;
+extern volatile UINT32  mNumberToFinish;

[Ray] It's very good that you keep other global variables in MpLib.c only.

Reviewed-by: Ray Ni <ray.ni@intel.com>




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