diff --git a/UefiCpuPkg/CpuDxe/CpuDxe.c b/UefiCpuPkg/CpuDxe/CpuDxe.c
index 10ad86da75..04d76a5ceb 100644
--- a/UefiCpuPkg/CpuDxe/CpuDxe.c
+++ b/UefiCpuPkg/CpuDxe/CpuDxe.c
@@ -1141,7 +1141,7 @@ InitInterruptDescriptorTable (
   //
   // Initialize Exception Handlers
   //
-  for (Index = 0; Index < 32; Index++) {
+  for (Index = OldIdtSize; Index < 32; Index++) {
     Status = CpuRegisterInterruptHandler (&gCpu, Index, CommonExceptionHandler);
     ASSERT_EFI_ERROR (Status);
   }