diff --git a/src/parameter.h b/src/parameter.h
--- a/src/parameter.h
+++ b/src/parameter.h
@@ -21,6 +21,9 @@
  *
  */
 
+// WARNING: This file is automatically generated by make_parameter_source.pl. Do not edit.
+// All edits will be discarded.
+
 #ifndef _PARAMETER_H_
 #define _PARAMETER_H_
 #include "vector.h"
@@ -139,6 +142,8 @@
   bool b4;
   char * dir1;
   char * dir2;
+  int export_interval;
+  char * export_fn_prefix;
  private:
  };
 
@@ -147,5 +152,3 @@
 
 
 #endif
-
-/* finis */