diff --git a/mex/sources/k_order_perturbation/dynamic_dll.cc b/mex/sources/k_order_perturbation/dynamic_dll.cc
index 8aae1c729..5c1fbbf7b 100644
--- a/mex/sources/k_order_perturbation/dynamic_dll.cc
+++ b/mex/sources/k_order_perturbation/dynamic_dll.cc
@@ -22,8 +22,7 @@
 
 #include <sstream>
 
-DynamicModelDLL::DynamicModelDLL(const string &modName, int nExog_arg, const string &sExt) throw (DynareException) :
-  nExog(nExog_arg)
+DynamicModelDLL::DynamicModelDLL(const string &modName, const string &sExt) throw (DynareException)
 {
   string fName;
 #if !defined(__CYGWIN32__) && !defined(_WIN32)
diff --git a/mex/sources/k_order_perturbation/dynamic_dll.hh b/mex/sources/k_order_perturbation/dynamic_dll.hh
index ffb235a47..e9ce127fc 100644
--- a/mex/sources/k_order_perturbation/dynamic_dll.hh
+++ b/mex/sources/k_order_perturbation/dynamic_dll.hh
@@ -42,7 +42,6 @@ class DynamicModelDLL
 {
 private:
   DynamicFn Dynamic; // pointer to the Dynamic function in DLL
-  const int nExog; // no of exogenous
 #if defined(_WIN32) || defined(__CYGWIN32__)
   HINSTANCE dynamicHinstance;  // DLL instance pointer in Windows
 #else
@@ -51,7 +50,7 @@ private:
 
 public:
   // construct and load Dynamic model DLL
-  DynamicModelDLL(const string &fname, int nExog_arg, const string &sExt) throw (DynareException);
+  DynamicModelDLL(const string &fname, const string &sExt) throw (DynareException);
   virtual ~DynamicModelDLL();
 
   void eval(const Vector &y, const Vector &x, const Vector &params, const Vector &ySteady,
diff --git a/mex/sources/k_order_perturbation/k_order_perturbation.cc b/mex/sources/k_order_perturbation/k_order_perturbation.cc
index 666a6549c..530c8929c 100644
--- a/mex/sources/k_order_perturbation/k_order_perturbation.cc
+++ b/mex/sources/k_order_perturbation/k_order_perturbation.cc
@@ -199,7 +199,7 @@ extern "C" {
         std::string jName(fName); //params.basename);
         jName += ".jnl";
         Journal journal(jName.c_str());
-        DynamicModelDLL dynamicDLL(fName, nExog, dfExt);
+        DynamicModelDLL dynamicDLL(fName, dfExt);
 
         // intiate tensor library
         tls.init(kOrder, nStat+2*nPred+3*nBoth+2*nForw+nExog);