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diff --git a/thirdparty/linux/include/coin/CoinPresolveImpliedFree.hpp b/thirdparty/linux/include/coin/CoinPresolveImpliedFree.hpp
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+/* $Id: CoinPresolveImpliedFree.hpp 1694 2014-04-29 02:08:35Z tkr $ */
+// Copyright (C) 2002, International Business Machines
+// Corporation and others.  All Rights Reserved.
+// This code is licensed under the terms of the Eclipse Public License (EPL).
+
+#ifndef CoinPresolveImpliedFree_H
+#define CoinPresolveImpliedFree_H
+
+/*!
+  \file
+*/
+
+#define	IMPLIED_FREE	9
+
+/*! \class implied_free_action
+    \brief Detect and process implied free variables
+
+  Consider a singleton variable x (<i>i.e.</i>, a variable involved in only
+  one constraint).  Suppose that the bounds on that constraint, combined with
+  the bounds on the other variables involved in the constraint, are such that
+  even the worst case values of the other variables still imply bounds for x
+  which are tighter than the variable's original bounds. Since x can never
+  reach its upper or lower bounds, it is an implied free variable. Both x and
+  the constraint can be deleted from the problem.
+
+  A similar transform for the case where the variable is not a natural column
+  singleton is handled by #subst_constraint_action.
+*/
+class implied_free_action : public CoinPresolveAction {
+  struct action {
+    int row, col;
+    double clo, cup;
+    double rlo, rup;
+    const double *rowels;
+    const double *costs;
+    int ninrow;
+  };
+
+  const int nactions_;
+  const action *const actions_;
+
+  implied_free_action(int nactions,
+		      const action *actions,
+		      const CoinPresolveAction *next) :
+    CoinPresolveAction(next),
+    nactions_(nactions), actions_(actions) {}
+
+ public:
+  const char *name() const;
+
+  static const CoinPresolveAction *presolve(CoinPresolveMatrix * prob,
+					 const CoinPresolveAction *next,
+					int & fillLevel);
+
+  void postsolve(CoinPostsolveMatrix *prob) const;
+
+  virtual ~implied_free_action();
+};
+
+#endif