diff --git a/MdeModulePkg/Universal/MemoryTest/BaseMemoryTestPei/BaseMemoryTest.c b/MdeModulePkg/Universal/MemoryTest/BaseMemoryTestPei/BaseMemoryTest.c
index 7ac082756a..39b2fdc70d 100644
--- a/MdeModulePkg/Universal/MemoryTest/BaseMemoryTestPei/BaseMemoryTest.c
+++ b/MdeModulePkg/Universal/MemoryTest/BaseMemoryTestPei/BaseMemoryTest.c
@@ -40,8 +40,8 @@ EFI_PEI_PPI_DESCRIPTOR   PpiListPeiBaseMemoryTest = {
 EFI_STATUS
 EFIAPI
 PeiBaseMemoryTestInit (
-  IN EFI_FFS_FILE_HEADER       *FfsHeader,
-  IN EFI_PEI_SERVICES          **PeiServices
+  IN       EFI_FFS_FILE_HEADER       *FfsHeader,
+  IN CONST EFI_PEI_SERVICES          **PeiServices
   )
 {
   return PeiServicesInstallPpi (&PpiListPeiBaseMemoryTest);