diff --git a/MdePkg/Include/Pi/PiMultiPhase.h b/MdePkg/Include/Pi/PiMultiPhase.h
index a5056799e1..89280d9d35 100644
--- a/MdePkg/Include/Pi/PiMultiPhase.h
+++ b/MdePkg/Include/Pi/PiMultiPhase.h
@@ -133,6 +133,22 @@ typedef struct {
 
 typedef EFI_MMRAM_DESCRIPTOR  EFI_SMRAM_DESCRIPTOR;
 
+///
+/// Structure describing a MMRAM region which cannot be used for the MMRAM heap.
+///
+typedef struct _EFI_MM_RESERVED_MMRAM_REGION {
+  ///
+  /// Starting address of the reserved MMRAM area, as it appears while MMRAM is open.
+  /// Ignored if MmramReservedSize is 0.
+  ///
+  EFI_PHYSICAL_ADDRESS    MmramReservedStart;
+  ///
+  /// Number of bytes occupied by the reserved MMRAM area. A size of zero indicates the
+  /// last MMRAM area.
+  ///
+  UINT64                  MmramReservedSize;
+} EFI_MM_RESERVED_MMRAM_REGION;
+
 typedef enum {
   EFI_PCD_TYPE_8,
   EFI_PCD_TYPE_16,
diff --git a/MdePkg/Include/Protocol/MmConfiguration.h b/MdePkg/Include/Protocol/MmConfiguration.h
index eeb94f64bd..d2fb6a13d4 100644
--- a/MdePkg/Include/Protocol/MmConfiguration.h
+++ b/MdePkg/Include/Protocol/MmConfiguration.h
@@ -21,22 +21,6 @@
     0x26eeb3de, 0xb689, 0x492e, {0x80, 0xf0, 0xbe, 0x8b, 0xd7, 0xda, 0x4b, 0xa7 }  \
   }
 
-///
-/// Structure describing a MMRAM region which cannot be used for the MMRAM heap.
-///
-typedef struct _EFI_MM_RESERVED_MMRAM_REGION {
-  ///
-  /// Starting address of the reserved MMRAM area, as it appears while MMRAM is open.
-  /// Ignored if MmramReservedSize is 0.
-  ///
-  EFI_PHYSICAL_ADDRESS    MmramReservedStart;
-  ///
-  /// Number of bytes occupied by the reserved MMRAM area. A size of zero indicates the
-  /// last MMRAM area.
-  ///
-  UINT64                  MmramReservedSize;
-} EFI_MM_RESERVED_MMRAM_REGION;
-
 typedef struct _EFI_MM_CONFIGURATION_PROTOCOL  EFI_MM_CONFIGURATION_PROTOCOL;
 
 /**