diff --git a/sv_vpi_user.h b/sv_vpi_user.h
new file mode 100644
index 000000000..d06c16689
--- /dev/null
+++ b/sv_vpi_user.h
@@ -0,0 +1,54 @@
+#ifndef __sv_vpi_user_H
+#define __sv_vpi_user_H
+/*
+ * Copyright (c) 2010 Stephen Williams (steve@icarus.com)
+ *
+ *    This source code is free software; you can redistribute it
+ *    and/or modify it in source code form under the terms of the GNU
+ *    General Public License as published by the Free Software
+ *    Foundation; either version 2 of the License, or (at your option)
+ *    any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+# include  "vpi_user.h"
+
+#if defined(__MINGW32__) || defined (__CYGWIN32__)
+#  define DLLEXPORT __declspec(dllexport)
+#else
+#  define DLLEXPORT
+#endif
+
+#ifdef __cplusplus
+# define EXTERN_C_START extern "C" {
+# define EXTERN_C_END }
+#else
+# define EXTERN_C_START
+# define EXTERN_C_END
+#endif
+
+#ifndef __GNUC__
+# undef  __attribute__
+# define __attribute__(x)
+#endif
+
+EXTERN_C_START
+
+/********* OBJECT TYPES ***********/
+#define vpiLongIntVar       610
+#define vpiShortIntVar      611
+#define vpiIntVar           612
+#define vpiByteVar          614
+#define vpiLogicVar         vpiReg
+
+EXTERN_C_END
+
+#endif