diff --git a/src/DynamicModel.cc b/src/DynamicModel.cc
index 5ee7bccf..65e55d01 100644
--- a/src/DynamicModel.cc
+++ b/src/DynamicModel.cc
@@ -3555,22 +3555,6 @@ DynamicModel::getUndiffLHSForPac(vector<int> &lhs, vector<expr_t> &lhs_expr_t, v
     }
 }
 
-int
-DynamicModel::getUndiffMaxLag(StaticModel &static_model, vector<expr_t> &lhs, vector<int> &eqnumber) const
-{
-  set<expr_t> lhs_static;
-  for(vector<expr_t>::const_iterator it = lhs.begin();
-      it != lhs.end(); it++)
-    lhs_static.insert((*it)->toStatic(static_model));
-
-  int max_lag = 0;
-  for (vector<int>::const_iterator it = eqnumber.begin();
-       it != eqnumber.end(); it++)
-    equations[*it]->get_arg2()->VarMaxLag(static_model, lhs_static, max_lag);
-
-  return max_lag;
-}
-
 void
 DynamicModel::walkPacParameters()
 {
diff --git a/src/DynamicModel.hh b/src/DynamicModel.hh
index 726a45a3..1b488488 100644
--- a/src/DynamicModel.hh
+++ b/src/DynamicModel.hh
@@ -316,8 +316,6 @@ public:
                                  int max_lag,
                                  vector<bool> &nonstationary,
                                  int growth_symb_id);
-  //! Get the max lag for the PAC VAR
-  int getUndiffMaxLag(StaticModel &static_model, vector<expr_t> &lhs, vector<int> &eqnumber) const;
 
   //! Substitutes pac_expectation operator
   void substitutePacExpectation();
diff --git a/src/ModFile.cc b/src/ModFile.cc
index 540a59a4..e87373b4 100644
--- a/src/ModFile.cc
+++ b/src/ModFile.cc
@@ -427,7 +427,6 @@ ModFile::transformPass(bool nostrict, bool stochastic, bool compute_xrefs, const
                    vector<int> orig_diff_var = var_model_info_pac_expectation[var_model_name].first.second.second;
                    vector<int> eqnumber = var_model_info_pac_expectation[var_model_name].second.second;
                    dynamic_model.getUndiffLHSForPac(lhs, lhs_expr_t, diff, orig_diff_var, eqnumber, undiff, diff_subst_table);
-                   max_lag = original_model.getUndiffMaxLag(diff_static_model, lhs_expr_t, eqnumber);
                  }
                pms->fillUndiffedLHS(lhs);
                dynamic_model.walkPacParameters();