diff --git a/ChangeLog b/ChangeLog
index 953f16c79..529bbd582 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2004-11-12  Alexandre Duret-Lutz  <adl@src.lip6.fr>
+
+	* misc/random.cc, misc/random.hh: New files.
+	* src/misc/Makefile.am (misc_HEADERS, libmisc_la_SOURCES): Add them.
+
 2004-11-10  Alexandre Duret-Lutz  <adl@src.lip6.fr>
 
 	* src/evtgbaparse/public.hh (evtgba_parse): Fix doxygen comments.
diff --git a/src/misc/Makefile.am b/src/misc/Makefile.am
index b04fc738d..43b87fdd4 100644
--- a/src/misc/Makefile.am
+++ b/src/misc/Makefile.am
@@ -33,6 +33,7 @@ misc_HEADERS = \
   hash.hh \
   minato.hh \
   modgray.hh \
+  random.hh \
   version.hh
 
 noinst_LTLIBRARIES = libmisc.la
@@ -43,4 +44,5 @@ libmisc_la_SOURCES = \
   freelist.cc \
   minato.cc \
   modgray.cc \
+  random.cc \
   version.cc
diff --git a/src/misc/random.cc b/src/misc/random.cc
new file mode 100644
index 000000000..8fede2fda
--- /dev/null
+++ b/src/misc/random.cc
@@ -0,0 +1,54 @@
+// 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 2 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 Spot; see the file COPYING.  If not, write to the Free
+// Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+// 02111-1307, USA.
+
+#include "random.hh"
+#include <cstdlib>
+
+namespace spot
+{
+  void
+  srand(unsigned int seed)
+  {
+    ::srand(seed);
+  }
+
+  double
+  drand()
+  {
+    double r = ::rand();
+    return r / (1.0 + RAND_MAX);
+  }
+
+  int
+  mrand(int max)
+  {
+    int res = static_cast<int>(max * drand());
+    return res;
+  }
+
+
+  int
+  rrand(int min, int max)
+  {
+    return min + static_cast<int>((max - min + 1) * drand());
+  }
+
+}
diff --git a/src/misc/random.hh b/src/misc/random.hh
new file mode 100644
index 000000000..c9837317b
--- /dev/null
+++ b/src/misc/random.hh
@@ -0,0 +1,46 @@
+// 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 2 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 Spot; see the file COPYING.  If not, write to the Free
+// Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+// 02111-1307, USA.
+
+namespace spot
+{
+  /// \brief Reset the seed of the pseudo-random number generator.
+  ///
+  /// \see drand, mrand, rrand
+  void srand(unsigned int seed);
+
+  /// \brief Compute a pseudo-random integer value between \a min and
+  /// \a max included.
+  ///
+  /// \see drand, mrand, srand
+  int rrand(int min, int max);
+
+  /// \brief Compute a pseudo-random integer value between  0 and
+  /// \a max-1 included.
+  ///
+  /// \see drand, rrand, srand
+  int mrand(int max);
+
+  /// \brief Compute a pseudo-random double value
+  /// between 0.0 and 1.0 (1.0 excluded).
+  ///
+  /// \see mrand, rrand, srand
+  double drand();
+}