diff --git a/src/tgbaalgos/gtec/Makefile.am b/src/tgbaalgos/gtec/Makefile.am
index 0d2835da8..7daa01b58 100644
--- a/src/tgbaalgos/gtec/Makefile.am
+++ b/src/tgbaalgos/gtec/Makefile.am
@@ -27,7 +27,6 @@ gtecdir = $(pkgincludedir)/tgbaalgos/gtec
 
 gtec_HEADERS = \
   ce.hh \
-  explscc.hh \
   gtec.hh \
   sccstack.hh \
   status.hh
@@ -35,7 +34,6 @@ gtec_HEADERS = \
 noinst_LTLIBRARIES = libgtec.la
 libgtec_la_SOURCES = \
   ce.cc \
-  explscc.cc \
   gtec.cc \
   sccstack.cc \
   status.cc
diff --git a/src/tgbaalgos/gtec/explscc.cc b/src/tgbaalgos/gtec/explscc.cc
deleted file mode 100644
index c489d0034..000000000
--- a/src/tgbaalgos/gtec/explscc.cc
+++ /dev/null
@@ -1,65 +0,0 @@
-// Copyright (C) 2011 Laboratoire de Recherche et Developpement de
-// l'Epita (LRDE).
-// Copyright (C) 2004  Laboratoire d'Informatique de Paris 6 (LIP6),
-// département Systèmes Répartis Coopératifs (SRC), Université Pierre
-// et Marie Curie.
-//
-// This file is part of Spot, a model checking library.
-//
-// Spot is free software; you can redistribute it and/or modify it
-// under the terms of the GNU General Public License as published by
-// the Free Software Foundation; either version 3 of the License, or
-// (at your option) any later version.
-//
-// Spot 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 General Public
-// License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-#include "explscc.hh"
-
-namespace spot
-{
-  const state*
-  connected_component_hash_set::has_state(const state* s) const
-  {
-    set_type::const_iterator it = states.find(s);
-    if (it != states.end())
-      {
-	if (s != *it)
-	  s->destroy();
-	return *it;
-      }
-    else
-      return 0;
-  }
-
-  void
-  connected_component_hash_set::insert(const state* s)
-  {
-    states.insert(s);
-  }
-
-  //////////////////////////////////////////////////////////////////////
-
-  connected_component_hash_set_factory::connected_component_hash_set_factory()
-    : explicit_connected_component_factory()
-  {
-  }
-
-  connected_component_hash_set*
-  connected_component_hash_set_factory::build() const
-  {
-    return new connected_component_hash_set();
-  }
-
-  const connected_component_hash_set_factory*
-  connected_component_hash_set_factory::instance()
-  {
-    static connected_component_hash_set_factory f;
-    return &f;
-  }
-}
diff --git a/src/tgbaalgos/gtec/explscc.hh b/src/tgbaalgos/gtec/explscc.hh
deleted file mode 100644
index e1a6ff810..000000000
--- a/src/tgbaalgos/gtec/explscc.hh
+++ /dev/null
@@ -1,91 +0,0 @@
-// -*- coding: utf-8 -*-
-// Copyright (C) 2011, 2013, 2014 Laboratoire de Recherche et Développement
-// de l'Epita (LRDE).
-// Copyright (C) 2004  Laboratoire d'Informatique de Paris 6 (LIP6),
-// département Systèmes Répartis Coopératifs (SRC), Université Pierre
-// et Marie Curie.
-//
-// This file is part of Spot, a model checking library.
-//
-// Spot is free software; you can redistribute it and/or modify it
-// under the terms of the GNU General Public License as published by
-// the Free Software Foundation; either version 3 of the License, or
-// (at your option) any later version.
-//
-// Spot 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 General Public
-// License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-#ifndef SPOT_TGBAALGOS_GTEC_EXPLSCC_HH
-# define SPOT_TGBAALGOS_GTEC_EXPLSCC_HH
-
-#include "misc/hash.hh"
-#include "sccstack.hh"
-
-namespace spot
-{
-  /// An SCC storing all its states explicitly.
-  class SPOT_API explicit_connected_component:
-    public scc_stack::connected_component
-  {
-  public:
-    virtual ~explicit_connected_component() {}
-    /// \brief Check if the SCC contains states \a s.
-    ///
-    /// Return the representative of \a s in the SCC, and destroy \a
-    /// s if it is different (acting like
-    /// numbered_state_heap::filter), or 0 otherwise.
-    virtual const state* has_state(const state* s) const = 0;
-
-    /// Insert a new state in the SCC.
-    virtual void insert(const state* s) = 0;
-  };
-
-  /// A straightforward implementation of explicit_connected_component
-  /// using a hash.
-  class SPOT_API connected_component_hash_set:
-    public explicit_connected_component
-  {
-  public:
-    virtual ~connected_component_hash_set() {}
-    virtual const state* has_state(const state* s) const;
-    virtual void insert(const state* s);
-  protected:
-    typedef std::unordered_set<const state*,
-			       state_ptr_hash, state_ptr_equal> set_type;
-    set_type states;
-  };
-
-  /// Abstract factory for explicit_connected_component.
-  class explicit_connected_component_factory
-  {
-  public:
-    virtual ~explicit_connected_component_factory() {}
-    /// Create an explicit_connected_component.
-    virtual explicit_connected_component* build() const = 0;
-  };
-
-  /// \brief Factory for connected_component_hash_set.
-  ///
-  /// This class is a singleton.  Retrieve the instance using instance().
-  class connected_component_hash_set_factory :
-    public explicit_connected_component_factory
-  {
-  public:
-    virtual connected_component_hash_set* build() const;
-
-    /// Get the unique instance of this class.
-    static const connected_component_hash_set_factory* instance();
-
-  protected:
-    virtual ~connected_component_hash_set_factory() {}
-    /// Construction is forbiden.
-    connected_component_hash_set_factory();
-  };
-}
-
-#endif // SPOT_TGBAALGOS_GTEC_EXPLSCC_HH