diff --git a/MdePkg/Include/Guid/SmramMemoryReserve.h b/MdePkg/Include/Guid/SmramMemoryReserve.h
index fc49092b93..392e426b1e 100644
--- a/MdePkg/Include/Guid/SmramMemoryReserve.h
+++ b/MdePkg/Include/Guid/SmramMemoryReserve.h
@@ -62,6 +62,6 @@ typedef struct {
   EFI_SMRAM_DESCRIPTOR  Descriptor[1];
 } EFI_SMRAM_HOB_DESCRIPTOR_BLOCK;
 
-extern EFI_GUID gEfiSmmPeiSmramMemoryReserve;
+extern EFI_GUID gEfiSmmPeiSmramMemoryReserveGuid;
 
 #endif
diff --git a/MdePkg/MdePkg.spd b/MdePkg/MdePkg.spd
index 7f29b355ed..f020bfc654 100644
--- a/MdePkg/MdePkg.spd
+++ b/MdePkg/MdePkg.spd
@@ -1466,7 +1466,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
       <HelpText/>
     </Entry>
     <Entry Name="SmmPeiSmramMemoryReserve">
-      <C_Name>gEfiSmmPeiSmramMemoryReserve</C_Name>
+      <C_Name>gEfiSmmPeiSmramMemoryReserveGuid</C_Name>
       <GuidValue>6DADF1D1-D4CC-4910-BB6E-82B1FD80FF3D</GuidValue>
       <HelpText/>
     </Entry>