diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index 1823990..6fdd0ef 100644
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -71,6 +71,9 @@
 /* event group ExitBootServices() invoked */
 const efi_guid_t efi_guid_event_group_exit_boot_services =
 			EFI_EVENT_GROUP_EXIT_BOOT_SERVICES;
+/* event group before ExitBootServices() invoked */
+const efi_guid_t efi_guid_event_group_before_exit_boot_services =
+			EFI_EVENT_GROUP_BEFORE_EXIT_BOOT_SERVICES;
 /* event group SetVirtualAddressMap() invoked */
 const efi_guid_t efi_guid_event_group_virtual_address_change =
 			EFI_EVENT_GROUP_VIRTUAL_ADDRESS_CHANGE;
@@ -2123,6 +2126,16 @@
 	if (!systab.boottime)
 		goto out;
 
+	/* Notify EFI_EVENT_GROUP_BEFORE_EXIT_BOOT_SERVICES event group. */
+	list_for_each_entry(evt, &efi_events, link) {
+		if (evt->group &&
+		    !guidcmp(evt->group,
+			     &efi_guid_event_group_before_exit_boot_services)) {
+			efi_signal_event(evt);
+			break;
+		}
+	}
+
 	/* Stop all timer related activities */
 	timers_enabled = false;