diff --git a/preprocessor/DynamicModel.cc b/preprocessor/DynamicModel.cc
index e613fedc5..eaf0a9438 100644
--- a/preprocessor/DynamicModel.cc
+++ b/preprocessor/DynamicModel.cc
@@ -1532,7 +1532,7 @@ DynamicModel::writeDynamicMFile(const string &dynamic_basename) const
       cerr << "Error: Can't open file " << filename << " for writing" << endl;
       exit(EXIT_FAILURE);
     }
-  mDynamicModelFile << "function [residual, g1, g2, g3] = " << dynamic_basename << "(y, x, params, steady_state, steady_state_x, it_)" << endl
+  mDynamicModelFile << "function [residual, g1, g2, g3] = " << dynamic_basename << "(y, x, params, steady_state, it_)" << endl
                     << "%" << endl
                     << "% Status : Computes dynamic model for Dynare" << endl
                     << "%" << endl
diff --git a/preprocessor/ExprNode.cc b/preprocessor/ExprNode.cc
index 22cfd2a06..d4121b729 100644
--- a/preprocessor/ExprNode.cc
+++ b/preprocessor/ExprNode.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2007-2015 Dynare Team
+ * Copyright (C) 2007-2014 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -712,10 +712,10 @@ VariableNode::writeOutput(ostream &output, ExprNodeOutputType output_type,
           break;
         case oMatlabOutsideModel:
           assert(lag == 0);
-          output <<  "steady_state_x(" << i << ")";
+          output <<  "oo_.exo_steady_state(" << i << ")";
           break;
         case oMatlabDynamicSteadyStateOperator:
-          output <<  "steady_state_x(" << i << ")";
+          output <<  "oo_.exo_steady_state(" << i << ")";
           break;
         case oSteadyStateFile:
           output << "exo_(" << i << ")";