diff --git a/MdeModulePkg/Core/Dxe/DxeMain.inf b/MdeModulePkg/Core/Dxe/DxeMain.inf
index e4bca89577..35d5bf0dee 100644
--- a/MdeModulePkg/Core/Dxe/DxeMain.inf
+++ b/MdeModulePkg/Core/Dxe/DxeMain.inf
@@ -100,6 +100,7 @@
   gEfiEventVirtualAddressChangeGuid             ## CONSUMES             ## Event
   ## CONSUMES   ## Event
   ## PRODUCES   ## Event
+  gEfiEventBeforeExitBootServicesGuid
   gEfiEventExitBootServicesGuid
   gEfiHobMemoryAllocModuleGuid                  ## SOMETIMES_CONSUMES   ## HOB
   gEfiFirmwareFileSystem2Guid                   ## CONSUMES             ## GUID # Used to compare with FV's file system guid and get the FV's file system format
diff --git a/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c b/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
index 5733f0c8ec..4683016ed7 100644
--- a/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
+++ b/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
@@ -763,6 +763,12 @@ CoreExitBootServices (
 {
   EFI_STATUS  Status;
 
+  //
+  // Notify other drivers of their last chance to use boot services
+  // before the memory map is terminated.
+  //
+  CoreNotifySignalList (&gEfiEventBeforeExitBootServicesGuid);
+
   //
   // Disable Timer
   //