diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c
index 8394572c61..924b9097f2 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
@@ -1814,7 +1814,7 @@ EnableDisableApWorker (
   if (!EnableAP) {
     SetApState (&CpuMpData->CpuData[ProcessorNumber], CpuStateDisabled);
   } else {
-    SetApState (&CpuMpData->CpuData[ProcessorNumber], CpuStateIdle);
+    ResetProcessorToIdleState (ProcessorNumber);
   }
 
   if (HealthFlag != NULL) {