diff --git a/DynareMain.cc b/DynareMain.cc
index 19d773b8..9320a4af 100644
--- a/DynareMain.cc
+++ b/DynareMain.cc
@@ -38,7 +38,7 @@
 void main2(stringstream &in, string &basename, bool debug, bool clear_all, bool clear_global, bool no_tmp_terms, bool no_log, bool no_warn,
            bool warn_uninit, bool console, bool nograph, bool nointeractive,
            bool parallel, const string &parallel_config_file, const string &cluster_name, bool parallel_slave_open_mode,
-           bool parallel_test, bool nostrict, FileOutputType output_mode, LanguageOutputType lang
+           bool parallel_test, bool nostrict, bool check_model_changes, FileOutputType output_mode, LanguageOutputType lang
 #if defined(_WIN32) || defined(__CYGWIN32__)
            , bool cygwin, bool msvc
 #endif
@@ -49,7 +49,7 @@ usage()
 {
   cerr << "Dynare usage: dynare mod_file [debug] [noclearall] [onlyclearglobals] [savemacro[=macro_file]] [onlymacro] [nolinemacro] [notmpterms] [nolog] [warn_uninit]"
        << " [console] [nograph] [nointeractive] [parallel[=cluster_name]] [conffile=parallel_config_path_and_filename] [parallel_slave_open_mode] [parallel_test] "
-       << " [-D<variable>[=<value>]] [nostrict] [output=dynamic|first|second|third] [language=C|C++]"
+       << " [-D<variable>[=<value>]] [nostrict] [fast] [output=dynamic|first|second|third] [language=C|C++]"
 #if defined(_WIN32) || defined(__CYGWIN32__)
        << " [cygwin] [msvc]"
 #endif
@@ -97,6 +97,7 @@ main(int argc, char **argv)
   bool parallel_slave_open_mode = false;
   bool parallel_test = false;
   bool nostrict = false;
+  bool check_model_changes = false;
   map<string, string> defines;
   FileOutputType output_mode = none;
   LanguageOutputType language = matlab;
@@ -165,6 +166,8 @@ main(int argc, char **argv)
         parallel_test = true;
       else if (!strcmp(argv[arg], "nostrict"))
         nostrict = true;
+      else if (!strcmp(argv[arg], "fast"))
+        check_model_changes = true;
       else if (strlen(argv[arg]) >= 8 && !strncmp(argv[arg], "parallel", 8))
         {
           parallel = true;
@@ -285,7 +288,7 @@ main(int argc, char **argv)
 
   // Do the rest
   main2(macro_output, basename, debug, clear_all, clear_global, no_tmp_terms, no_log, no_warn, warn_uninit, console, nograph, nointeractive,
-        parallel, parallel_config_file, cluster_name, parallel_slave_open_mode, parallel_test, nostrict, output_mode, language
+        parallel, parallel_config_file, cluster_name, parallel_slave_open_mode, parallel_test, nostrict, check_model_changes, output_mode, language
 #if defined(_WIN32) || defined(__CYGWIN32__)
         , cygwin, msvc
 #endif
diff --git a/DynareMain2.cc b/DynareMain2.cc
index 376dd20a..fe1c6942 100644
--- a/DynareMain2.cc
+++ b/DynareMain2.cc
@@ -27,7 +27,7 @@
 void
 main2(stringstream &in, string &basename, bool debug, bool clear_all, bool clear_global, bool no_tmp_terms, bool no_log, bool no_warn, bool warn_uninit, bool console, bool nograph, bool nointeractive,
       bool parallel, const string &parallel_config_file, const string &cluster_name, bool parallel_slave_open_mode,
-      bool parallel_test, bool nostrict, FileOutputType output_mode, LanguageOutputType language
+      bool parallel_test, bool nostrict, bool check_model_changes, FileOutputType output_mode, LanguageOutputType language
 #if defined(_WIN32) || defined(__CYGWIN32__)
       , bool cygwin, bool msvc
 #endif
@@ -60,11 +60,12 @@ main2(stringstream &in, string &basename, bool debug, bool clear_all, bool clear
   if (output_mode != none)
     mod_file->writeExternalFiles(basename, output_mode, language);
   else
-    mod_file->writeOutputFiles(basename, clear_all, clear_global, no_log, no_warn, console, nograph, nointeractive, config_file
+    mod_file->writeOutputFiles(basename, clear_all, clear_global, no_log, no_warn, console, nograph,
+			       nointeractive, config_file, check_model_changes
 #if defined(_WIN32) || defined(__CYGWIN32__)
-                             , cygwin, msvc
+			       , cygwin, msvc
 #endif
-                             );
+			       );
 
   delete mod_file;
 
diff --git a/ModFile.cc b/ModFile.cc
index 9f8f73f5..c6b7ca83 100644
--- a/ModFile.cc
+++ b/ModFile.cc
@@ -526,7 +526,8 @@ ModFile::computingPass(bool no_tmp_terms, FileOutputType output)
 }
 
 void
-ModFile::writeOutputFiles(const string &basename, bool clear_all, bool clear_global, bool no_log, bool no_warn, bool console, bool nograph, bool nointeractive, const ConfigFile &config_file
+ModFile::writeOutputFiles(const string &basename, bool clear_all, bool clear_global, bool no_log, bool no_warn, bool console, bool nograph,
+			  bool nointeractive, const ConfigFile &config_file, bool check_model_changes
 #if defined(_WIN32) || defined(__CYGWIN32__)
                           , bool cygwin, bool msvc
 #endif
@@ -650,7 +651,9 @@ ModFile::writeOutputFiles(const string &basename, bool clear_all, bool clear_glo
                 << "end" << endl;
 
   bool hasModelChanged = !dynamic_model.isChecksumMatching(basename);
-      
+  if (!check_model_changes)
+    hasModelChanged = true;
+  
   if (hasModelChanged)
     {
       // Erase possible remnants of previous runs
@@ -700,20 +703,21 @@ ModFile::writeOutputFiles(const string &basename, bool clear_all, bool clear_glo
 #endif
 
   // Compile the dynamic MEX file for use_dll option
+  // When check_model_changes is true, don't force compile if MEX is fresher than source
   if (use_dll)
     {
 #if defined(_WIN32) || defined(__CYGWIN32__)
       if (msvc)
         // MATLAB/Windows + Microsoft Visual C++
-	mOutputFile << "dyn_mex('msvc', '" << basename << ", 1)" <<  endl;
+	mOutputFile << "dyn_mex('msvc', '" << basename << "', " << !check_model_changes << ")" <<  endl;
       else if (cygwin)
         // MATLAB/Windows + Cygwin g++
-	mOutputFile << "dyn_mex('cygwin', '" << basename << "', 1)" << endl;
+	mOutputFile << "dyn_mex('cygwin', '" << basename << "', " << !check_model_changes << ")" << endl;
       else
         mOutputFile << "    error('When using the USE_DLL option, you must give either ''cygwin'' or ''msvc'' option to the ''dynare'' command')" << endl;
 #else
-	// other configurations
-	mOutputFile << "dyn_mex('', '" << basename << "', 1)" << endl;
+      // other configurations
+      mOutputFile << "dyn_mex('', '" << basename << "', " << !check_model_changes << ")" << endl;
 #endif
     }
 
diff --git a/ModFile.hh b/ModFile.hh
index 0a384931..bf363668 100644
--- a/ModFile.hh
+++ b/ModFile.hh
@@ -145,7 +145,8 @@ public:
     \param cygwin Should the MEX command of use_dll be adapted for Cygwin?
     \param msvc Should the MEX command of use_dll be adapted for MSVC?
   */
-  void writeOutputFiles(const string &basename, bool clear_all, bool clear_global, bool no_log, bool no_warn, bool console, bool nograph, bool nointeractive, const ConfigFile &config_file
+  void writeOutputFiles(const string &basename, bool clear_all, bool clear_global, bool no_log, bool no_warn,
+			bool console, bool nograph, bool nointeractive, const ConfigFile &config_file, bool check_model_changes
 #if defined(_WIN32) || defined(__CYGWIN32__)
                         , bool cygwin, bool msvc
 #endif