diff --git a/include/mf_common.h b/include/mf_common.h
new file mode 100644
index 0000000..fcbd565
--- /dev/null
+++ b/include/mf_common.h
@@ -0,0 +1,98 @@
+/****************************************************************************
+ * Copyright 2020 Thomas E. Dickey                                          *
+ * Copyright 1998-2005,2012 Free Software Foundation, Inc.                  *
+ *                                                                          *
+ * Permission is hereby granted, free of charge, to any person obtaining a  *
+ * copy of this software and associated documentation files (the            *
+ * "Software"), to deal in the Software without restriction, including      *
+ * without limitation the rights to use, copy, modify, merge, publish,      *
+ * distribute, distribute with modifications, sublicense, and/or sell       *
+ * copies of the Software, and to permit persons to whom the Software is    *
+ * furnished to do so, subject to the following conditions:                 *
+ *                                                                          *
+ * The above copyright notice and this permission notice shall be included  *
+ * in all copies or substantial portions of the Software.                   *
+ *                                                                          *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
+ *                                                                          *
+ * Except as contained in this notice, the name(s) of the above copyright   *
+ * holders shall not be used in advertising or otherwise to promote the     *
+ * sale, use or other dealings in this Software without prior written       *
+ * authorization.                                                           *
+ ****************************************************************************/
+
+/****************************************************************************
+ *   Author:  Juergen Pfeifer, 1995,1997                                    *
+ ****************************************************************************/
+
+/* $Id: mf_common.h,v 0.25 2020/02/02 23:34:34 tom Exp $ */
+
+/* Common internal header for menu and form library */
+
+#ifndef MF_COMMON_H_incl
+#define MF_COMMON_H_incl 1
+
+#include <ncurses_cfg.h>
+#include <curses.h>
+
+#include <stdlib.h>
+#include <sys/types.h>
+#include <assert.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+
+#if DECL_ERRNO
+extern int errno;
+#endif
+
+/* in case of debug version we ignore the suppression of assertions */
+#ifdef TRACE
+#  ifdef NDEBUG
+#    undef NDEBUG
+#  endif
+#endif
+
+#include <nc_alloc.h>
+
+#if USE_RCS_IDS
+#define MODULE_ID(id) static const char Ident[] = id;
+#else
+#define MODULE_ID(id)		/*nothing */
+#endif
+
+/* Maximum regular 8-bit character code */
+#define MAX_REGULAR_CHARACTER (0xff)
+
+#define SET_ERROR(code) (errno=(code))
+#define GET_ERROR()     (errno)
+
+#ifdef TRACE
+#define RETURN(code)    returnCode( SET_ERROR(code) )
+#else
+#define RETURN(code)    return( SET_ERROR(code) )
+#endif
+
+/* The few common values in the status fields for menus and forms */
+#define _POSTED         (0x01U)	/* menu or form is posted                  */
+#define _IN_DRIVER      (0x02U)	/* menu or form is processing hook routine */
+
+#define SetStatus(target,mask) (target)->status |= (unsigned short) (mask)
+#define ClrStatus(target,mask) (target)->status = (unsigned short) (target->status & (~mask))
+
+/* Call object hook */
+#define Call_Hook( object, handler ) \
+   if ( (object) != 0 && ((object)->handler) != (void *) 0 )\
+   {\
+	SetStatus(object, _IN_DRIVER);\
+	(object)->handler(object);\
+	ClrStatus(object, _IN_DRIVER);\
+   }
+
+#endif /* MF_COMMON_H_incl */