diff --git a/MdePkg/Include/Protocol/SmmAccess2.h b/MdePkg/Include/Protocol/SmmAccess2.h
index 17e884e605..533c11d05e 100644
--- a/MdePkg/Include/Protocol/SmmAccess2.h
+++ b/MdePkg/Include/Protocol/SmmAccess2.h
@@ -89,7 +89,7 @@ typedef struct _EFI_SMM_ACCESS2_PROTOCOL  EFI_SMM_ACCESS2_PROTOCOL;
 typedef
 EFI_STATUS
 (EFIAPI *EFI_SMM_OPEN)(
-  IN CONST EFI_SMM_ACCESS2_PROTOCOL  *This
+  IN EFI_SMM_ACCESS2_PROTOCOL  *This
   );
 
 /**
@@ -107,7 +107,7 @@ EFI_STATUS
 typedef
 EFI_STATUS
 (EFIAPI *EFI_SMM_CLOSE)(
-  IN CONST EFI_SMM_ACCESS2_PROTOCOL  *This
+  IN EFI_SMM_ACCESS2_PROTOCOL  *This
   );
 
 /**
@@ -124,7 +124,7 @@ EFI_STATUS
 typedef
 EFI_STATUS
 (EFIAPI *EFI_SMM_LOCK)(
-  IN CONST EFI_SMM_ACCESS2_PROTOCOL  *This
+  IN EFI_SMM_ACCESS2_PROTOCOL  *This
   );
 
 /**