diff --git a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/CpuFeaturesInitialize.c b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/CpuFeaturesInitialize.c
index 7a5939c966..173f2edbea 100644
--- a/UefiCpuPkg/Library/RegisterCpuFeaturesLib/CpuFeaturesInitialize.c
+++ b/UefiCpuPkg/Library/RegisterCpuFeaturesLib/CpuFeaturesInitialize.c
@@ -1029,6 +1029,7 @@ SetProcessorRegister (
 
   InitApicId = GetInitialApicId ();
   RegisterTable = NULL;
+  ProcIndex = (UINTN)-1;
   for (Index = 0; Index < AcpiCpuData->NumberOfCpus; Index++) {
     if (RegisterTables[Index].InitialApicId == InitApicId) {
       RegisterTable =  &RegisterTables[Index];