diff --git a/eo/src/es/make_op_es.cpp b/eo/src/es/make_op_es.cpp
new file mode 100644
index 00000000..4d4fd948
--- /dev/null
+++ b/eo/src/es/make_op_es.cpp
@@ -0,0 +1,75 @@
+// -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
+
+//-----------------------------------------------------------------------------
+// make_op_real.cpp
+// (c) Maarten Keijzer, Marc Schoenauer and GeNeura Team, 2001
+/* 
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library 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
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Contact: todos@geneura.ugr.es, http://geneura.ugr.es
+             Marc.Schoenauer@polytechnique.fr
+             mkeijzer@dhi.dk
+ */
+//-----------------------------------------------------------------------------
+
+/** This file contains ***INSTANCIATED DEFINITIONS*** of operators fns
+ * of the library for ***eoReal*** evolution inside EO.
+ * It should be included in the file that calls any of the corresponding fns
+ * Compiling this file allows one to generate part of the library (i.e. object
+ * files that you just need to link with your own main and fitness code).
+ *
+ * The corresponding ***INSTANCIATED DECLARATIONS*** are contained 
+ *       in es.h in src/es dir
+ * while the TEMPLATIZED code is define in make_op.h in the es dir
+ *
+ */
+
+// Templatized code
+#include <es/make_op_es.h>
+
+/// The following function merely call the templatized do_* functions above
+
+// operators
+////////////
+eoGenOp<eoEsSimple<double> >&  make_op(eoParameterLoader& _parser, eoState& _state, eoRealInitBounded<eoEsSimple<double> >& _init)
+{
+  return do_make_op(_parser, _state, _init);
+}
+
+eoGenOp<eoEsSimple<eoMinimizingFitness> >&  make_op(eoParameterLoader& _parser, eoState& _state, eoRealInitBounded<eoEsSimple<eoMinimizingFitness> >& _init)
+{
+  return do_make_op(_parser, _state, _init);
+}
+
+eoGenOp<eoEsStdev<double> >&  make_op(eoParameterLoader& _parser, eoState& _state, eoRealInitBounded<eoEsStdev<double> >& _init)
+{
+  return do_make_op(_parser, _state, _init);
+}
+
+eoGenOp<eoEsStdev<eoMinimizingFitness> >&  make_op(eoParameterLoader& _parser, eoState& _state, eoRealInitBounded<eoEsStdev<eoMinimizingFitness> >& _init)
+{
+  return do_make_op(_parser, _state, _init);
+}
+
+eoGenOp<eoEsFull<double> >&  make_op(eoParameterLoader& _parser, eoState& _state, eoRealInitBounded<eoEsFull<double> >& _init)
+{
+  return do_make_op(_parser, _state, _init);
+}
+
+eoGenOp<eoEsFull<eoMinimizingFitness> >&  make_op(eoParameterLoader& _parser, eoState& _state, eoRealInitBounded<eoEsFull<eoMinimizingFitness> >& _init)
+{
+  return do_make_op(_parser, _state, _init);
+}
+