diff --git a/include/efi_load_initrd.h b/include/efi_load_initrd.h
index 478ae80..be5d5a7 100644
--- a/include/efi_load_initrd.h
+++ b/include/efi_load_initrd.h
@@ -16,6 +16,7 @@
 #define EFI_INITRD_MEDIA_GUID \
 	EFI_GUID(0x5568e427, 0x68fc, 0x4f3d, \
 		 0xac, 0x74, 0xca, 0x55, 0x52, 0x31, 0xcc, 0x68)
+extern const efi_guid_t efi_lf2_initrd_guid;
 
 struct efi_initrd_dp {
 	struct efi_device_path_vendor vendor;