diff --git a/inc/subst/elf.h b/inc/subst/elf.h
index 0e69637..7004996 100644
--- a/inc/subst/elf.h
+++ b/inc/subst/elf.h
@@ -1,3 +1,15 @@
+/* Copyright (C) 2024 GNU-EFI Contributors
+
+This library is free software;
+you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation;
+either version 2.1 of the License, or (at your option) any later version.
+This library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+See the GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along with this library;
+if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+*/
 
 #if !defined(__APPLE__) && !defined(__GNU_EFI_IS_APPLE)
 #include <elf.h>
@@ -44,6 +56,9 @@ typedef struct {
 #define ELF64_R_TYPE(i)			((i) & 0xffffffff)
 
 #define DT_NULL		0
+#define DT_REL		17
+#define DT_RELSZ	18
+#define DT_RELENT	19
 #define DT_RELA		7
 #define DT_RELASZ	8
 #define DT_RELAENT	9