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diff --git a/src/proof/simplify_boolean_node.h b/src/proof/simplify_boolean_node.h
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+/*********************                                                        */
+/*! \file simplify_boolean_node.h
+ ** \verbatim
+ ** Top contributors (to current version):
+ **   Guy Katz
+ ** This file is part of the CVC4 project.
+ ** Copyright (c) 2009-2016 by the authors listed in the file AUTHORS
+ ** in the top-level source directory) and their institutional affiliations.
+ ** All rights reserved.  See the file COPYING in the top-level source
+ ** directory for licensing information.\endverbatim
+ **
+ ** \brief Simplifying a boolean node, needed for constructing LFSC proofs.
+ **
+ **/
+
+#include "cvc4_private.h"
+
+#ifndef __CVC4__SIMPLIFY_BOOLEAN_NODE_H
+#define __CVC4__SIMPLIFY_BOOLEAN_NODE_H
+
+namespace CVC4 {
+
+Node simplifyBooleanNode(const Node &n);
+
+}/* CVC4 namespace */
+
+#endif /* __CVC4__SIMPLIFY_BOOLEAN_NODE_H */