diff --git a/DynareMain.cc b/DynareMain.cc
index 5e5ff6ca51fccde03314741dcdb8334b126264e1..bee2ce3a3c9b88a476784ca55d38bc44bd98cb61 100644
--- a/DynareMain.cc
+++ b/DynareMain.cc
@@ -62,7 +62,7 @@ usage()
 #if defined(_WIN32) || defined(__CYGWIN32__) || defined(__MINGW32__)
        << " [cygwin] [msvc] [mingw]"
 #endif
-       << " [json=parse|check|transform|compute] [jsonstdout] [onlyjson] [jsonderivsimple] [nopathchange]"
+       << " [json=parse|check|transform|compute] [jsonstdout] [onlyjson] [jsonderivsimple] [nopathchange] [nopreprocessoroutput]"
        << endl;
   exit(EXIT_FAILURE);
 }