diff --git a/mex/sources/estimation/ModelSolution.cc b/mex/sources/estimation/ModelSolution.cc
index 73066a795..18e5e389a 100644
--- a/mex/sources/estimation/ModelSolution.cc
+++ b/mex/sources/estimation/ModelSolution.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010-2012 Dynare Team
+ * Copyright (C) 2010-2013 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -37,7 +37,7 @@ ModelSolution::ModelSolution(const std::string &dynamicDllFile,  size_t n_endo_a
   n_jcols(n_exo+n_endo+ zeta_back_arg.size() /*nsPred*/ + zeta_fwrd_arg.size() /*nsForw*/ +2*zeta_mixed_arg.size()),
   jacobian(n_endo, n_jcols), residual(n_endo), Mx(1, n_exo),
   decisionRules(n_endo_arg, n_exo_arg, zeta_fwrd_arg, zeta_back_arg, zeta_mixed_arg, zeta_static_arg, INqz_criterium),
-  dynamicDLLp(dynamicDllFile, n_exo),
+  dynamicDLLp(dynamicDllFile),
   llXsteadyState(n_jcols-n_exo)
 {
   Mx.setAll(0.0);
diff --git a/mex/sources/estimation/utils/dynamic_dll.cc b/mex/sources/estimation/utils/dynamic_dll.cc
index 495e0bae4..2bd60aaa8 100644
--- a/mex/sources/estimation/utils/dynamic_dll.cc
+++ b/mex/sources/estimation/utils/dynamic_dll.cc
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2010-2012 Dynare Team
+ * Copyright (C) 2010-2013 Dynare Team
  *
  * This file is part of Dynare.
  *
@@ -23,8 +23,7 @@
 
 using namespace std;
 
-DynamicModelDLL::DynamicModelDLL(const std::string &dynamicDllFile, size_t n_exog_arg) throw (TSException) :
-  n_exog(n_exog_arg)
+DynamicModelDLL::DynamicModelDLL(const std::string &dynamicDllFile) throw (TSException)
 {
   std::string fName;
 #if !defined(__CYGWIN32__) && !defined(_WIN32)
diff --git a/mex/sources/estimation/utils/dynamic_dll.hh b/mex/sources/estimation/utils/dynamic_dll.hh
index d4ab4b7d4..54335a98a 100644
--- a/mex/sources/estimation/utils/dynamic_dll.hh
+++ b/mex/sources/estimation/utils/dynamic_dll.hh
@@ -44,7 +44,6 @@ class DynamicModelDLL
 {
 private:
   DynamicFn Dynamic; // pointer to the Dynamic function in DLL
-  const size_t n_exog; // no of exogenous
 #if defined(_WIN32) || defined(__CYGWIN32__)
   HINSTANCE dynamicHinstance;  // DLL instance pointer in Windows
 #else
@@ -53,7 +52,7 @@ private:
 
 public:
   // construct and load Dynamic model DLL
-  DynamicModelDLL(const std::string &dynamicDllFile, size_t n_exog_arg) throw (TSException);
+  DynamicModelDLL(const std::string &dynamicDllFile) throw (TSException);
   virtual ~DynamicModelDLL();
 
   //! evaluate Dynamic model DLL