diff --git a/preprocessor/DataTree.cc b/preprocessor/DataTree.cc
index db60f58beb69db34073c8ff60a2e8903a9766dc2..f151fa3aa8be1e22c474189764e60c0a12a19587 100644
--- a/preprocessor/DataTree.cc
+++ b/preprocessor/DataTree.cc
@@ -651,13 +651,15 @@ DataTree::writePowerDeriv(ostream &output, bool use_dll) const
            << "% The k-th derivative of x^p" << endl
            << "%" << endl
            << "function dxp=getPowerDeriv(x,p,k)" << endl
-           << "if (abs(x) < " << NEAR_ZERO << ") && (p > 0) && (k >= p) && (abs(p - round(p)) < " << NEAR_ZERO << ")" << endl
-           << "    dxp = 0;" << endl
-           << "else" << endl
-           << "    dxp = x^(p-k);" << endl
-           << "    for i=0:k-1" << endl
-           << "        dxp = dxp*p;" << endl
-           << "        p = p-1;" << endl
+           << "    if (abs(x) < " << NEAR_ZERO << ") && (p > 0) && (k >= p) && (abs(p - round(p)) < " << NEAR_ZERO << ")" << endl
+           << "        dxp = 0;" << endl
+           << "    else" << endl
+           << "        dxp = x^(p-k);" << endl
+           << "        for i=0:k-1" << endl
+           << "            dxp = dxp*p;" << endl
+           << "            p = p-1;" << endl
+           << "        end" << endl
            << "    end" << endl
            << "end" << endl;
+
 }
diff --git a/preprocessor/DynamicModel.cc b/preprocessor/DynamicModel.cc
index 07ff6e8101fe486310d2491a9b73af04e363b2ed..ee0673ec6d5a58c51a7f2febbf37a65c5846b74b 100644
--- a/preprocessor/DynamicModel.cc
+++ b/preprocessor/DynamicModel.cc
@@ -795,6 +795,7 @@ DynamicModel::writeModelEquationsOrdered_M(const string &dynamic_basename) const
         default:
           break;
         }
+      output << "end" << endl;
       writePowerDeriv(output, false);
       output.close();
     }
@@ -2033,7 +2034,7 @@ DynamicModel::writeSparseDynamicMFile(const string &dynamic_basename, const stri
   open_par = false;
   mDynamicModelFile << "  oo_.endo_simul = y';\n";
   mDynamicModelFile << "return;\n";
-
+  mDynamicModelFile << "end" << endl;
   writePowerDeriv(mDynamicModelFile, false);
 
   mDynamicModelFile.close();
diff --git a/preprocessor/StaticModel.cc b/preprocessor/StaticModel.cc
index 73e77048fc3a4e247569bd60c395418e0ef140c2..f072ff2b26be8ffb9f28ea24b29fb47a7c2824be 100644
--- a/preprocessor/StaticModel.cc
+++ b/preprocessor/StaticModel.cc
@@ -407,6 +407,7 @@ StaticModel::writeModelEquationsOrdered_M(const string &static_basename) const
         default:
           break;
         }
+      output << "end" << endl;
       writePowerDeriv(output, false);
       output.close();
     }