diff --git a/EmulatorPkg/CpuRuntimeDxe/MpService.c b/EmulatorPkg/CpuRuntimeDxe/MpService.c
index 9ce23c0898..d79abd2989 100644
--- a/EmulatorPkg/CpuRuntimeDxe/MpService.c
+++ b/EmulatorPkg/CpuRuntimeDxe/MpService.c
@@ -865,8 +865,6 @@ CpuMpServicesEnableDisableAP (
     return EFI_UNSUPPORTED;
   }
 
-  gThread->MutexLock (gMPSystem.ProcessorData[ProcessorNumber].StateLock);
-
   if (EnableAP) {
     if ((gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag & PROCESSOR_ENABLED_BIT) == 0 ) {
       gMPSystem.NumberOfEnabledProcessors++;
@@ -884,8 +882,6 @@ CpuMpServicesEnableDisableAP (
     gMPSystem.ProcessorData[ProcessorNumber].Info.StatusFlag |= (*HealthFlag & PROCESSOR_HEALTH_STATUS_BIT);
   }
 
-  gThread->MutexUnlock (gMPSystem.ProcessorData[ProcessorNumber].StateLock);
-
   return EFI_SUCCESS;
 }