diff --git a/UefiCpuPkg/CpuMpPei/PeiMpServices.c b/UefiCpuPkg/CpuMpPei/PeiMpServices.c
index 625c24a6f4..4215f9e51b 100644
--- a/UefiCpuPkg/CpuMpPei/PeiMpServices.c
+++ b/UefiCpuPkg/CpuMpPei/PeiMpServices.c
@@ -441,6 +441,10 @@ PeiStartupAllAPs (
     return EFI_NOT_FOUND;
   }
 
+  if (Procedure == NULL) {
+    return EFI_INVALID_PARAMETER;
+  }
+
   //
   // Check whether caller processor is BSP
   //