diff --git a/MdeModulePkg/Core/Dxe/DxeMain.h b/MdeModulePkg/Core/Dxe/DxeMain.h
index 1a0babba71..07b86ba696 100644
--- a/MdeModulePkg/Core/Dxe/DxeMain.h
+++ b/MdeModulePkg/Core/Dxe/DxeMain.h
@@ -2948,4 +2948,22 @@ ApplyMemoryProtectionPolicy (
   IN  UINT64                Length
   );
 
+/**
+  Merge continous memory map entries whose have same attributes.
+
+  @param  MemoryMap       A pointer to the buffer in which firmware places
+                          the current memory map.
+  @param  MemoryMapSize   A pointer to the size, in bytes, of the
+                          MemoryMap buffer. On input, this is the size of
+                          the current memory map.  On output,
+                          it is the size of new memory map after merge.
+  @param  DescriptorSize  Size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.
+**/
+VOID
+MergeMemoryMap (
+  IN OUT EFI_MEMORY_DESCRIPTOR  *MemoryMap,
+  IN OUT UINTN                  *MemoryMapSize,
+  IN UINTN                      DescriptorSize
+  );
+
 #endif
diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c b/MdeModulePkg/Core/Dxe/Mem/Page.c
index 962ae90d3d..853606653c 100644
--- a/MdeModulePkg/Core/Dxe/Mem/Page.c
+++ b/MdeModulePkg/Core/Dxe/Mem/Page.c
@@ -1915,6 +1915,8 @@ CoreGetMemoryMap (
                                       EFI_MEMORY_XP);
     MemoryMap = NEXT_MEMORY_DESCRIPTOR (MemoryMap, Size);
   }
+  MergeMemoryMap (MemoryMapStart, &BufferSize, Size);
+  MemoryMapEnd = (EFI_MEMORY_DESCRIPTOR *)((UINT8 *)MemoryMapStart + BufferSize);
 
   Status = EFI_SUCCESS;
 
diff --git a/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c b/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c
index 6cf5edcbe5..75d9b14c1f 100644
--- a/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c
+++ b/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c
@@ -182,7 +182,6 @@ SortMemoryMap (
                                  it is the size of new memory map after merge.
   @param  DescriptorSize         Size, in bytes, of an individual EFI_MEMORY_DESCRIPTOR.
 **/
-STATIC
 VOID
 MergeMemoryMap (
   IN OUT EFI_MEMORY_DESCRIPTOR  *MemoryMap,