diff --git a/lib/libcurses/Makefile b/lib/libcurses/Makefile
index 55fbed5049d7..b06d683ba3f7 100644
--- a/lib/libcurses/Makefile
+++ b/lib/libcurses/Makefile
@@ -10,7 +10,7 @@ SRCS=	addbytes.c addch.c addnstr.c box.c clear.c clrtobot.c clrtoeol.c \
 	overwrite.c printw.c putchar.c refresh.c scanw.c scroll.c setterm.c \
 	standout.c toucholap.c touchwin.c tscroll.c tstp.c tty.c unctrl.c
 MAN=	curses.3
-INCS=curses.h
+INCS=curses.h unctrl.h
 INCSDIR=/usr/include
 
 .if make(install)
diff --git a/lib/libcurses/unctrl.h b/lib/libcurses/unctrl.h
new file mode 100644
index 000000000000..dc13551d94bd
--- /dev/null
+++ b/lib/libcurses/unctrl.h
@@ -0,0 +1,44 @@
+/*	$NetBSD: unctrl.h,v 1.1 1997/05/23 23:12:32 jtc Exp $	*/
+
+/*
+ * Copyright (c) 1982, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)unctrl.h	8.1 (Berkeley) 5/31/93
+ */
+
+/*
+ * unctrl.h
+ */
+
+extern char	*_unctrl[];
+
+# define	unctrl(ch)	(_unctrl[ch & 0177])