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diff --git a/backend/InterfGraph.v b/backend/InterfGraph.v
index 5dc4fe9..c9891c2 100644
--- a/backend/InterfGraph.v
+++ b/backend/InterfGraph.v
@@ -1,3 +1,15 @@
+(* *********************************************************************)
+(* *)
+(* The Compcert verified compiler *)
+(* *)
+(* Xavier Leroy, INRIA Paris-Rocquencourt *)
+(* *)
+(* Copyright Institut National de Recherche en Informatique et en *)
+(* Automatique. All rights reserved. This file is distributed *)
+(* under the terms of the INRIA Non-Commercial License Agreement. *)
+(* *)
+(* *********************************************************************)
+
(** Representation of interference graphs for register allocation. *)
Require Import Coqlib.