diff --git a/ncurses/tinfo/add_tries.c b/ncurses/tinfo/add_tries.c
new file mode 100644
index 0000000..455d142
--- /dev/null
+++ b/ncurses/tinfo/add_tries.c
@@ -0,0 +1,120 @@
+/****************************************************************************
+ * Copyright (c) 1998-2005,2006 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: Thomas E. Dickey            1998-on                             *
+ ****************************************************************************/
+
+/*
+**	add_tries.c
+**
+**	Add keycode/string to tries-tree.
+**
+*/
+
+#include <curses.priv.h>
+
+MODULE_ID("$Id: add_tries.c,v 1.8 2006/12/30 23:15:26 tom Exp $")
+
+#define SET_TRY(dst,src) if ((dst->ch = *src++) == 128) dst->ch = '\0'
+#define CMP_TRY(a,b) ((a)? (a == b) : (b == 128))
+
+NCURSES_EXPORT(int)
+_nc_add_to_try(TRIES ** tree, const char *str, unsigned code)
+{
+    TRIES *ptr, *savedptr;
+    unsigned const char *txt = (unsigned const char *) str;
+
+    T((T_CALLED("_nc_add_to_try(%p, %s, %u)"), *tree, _nc_visbuf(str), code));
+    if (txt == 0 || *txt == '\0' || code == 0)
+	returnCode(ERR);
+
+    if ((*tree) != 0) {
+	ptr = savedptr = (*tree);
+
+	for (;;) {
+	    unsigned char cmp = *txt;
+
+	    while (!CMP_TRY(ptr->ch, cmp)
+		   && ptr->sibling != 0)
+		ptr = ptr->sibling;
+
+	    if (CMP_TRY(ptr->ch, cmp)) {
+		if (*(++txt) == '\0') {
+		    ptr->value = code;
+		    returnCode(OK);
+		}
+		if (ptr->child != 0)
+		    ptr = ptr->child;
+		else
+		    break;
+	    } else {
+		if ((ptr->sibling = typeCalloc(TRIES, 1)) == 0) {
+		    returnCode(ERR);
+		}
+
+		savedptr = ptr = ptr->sibling;
+		SET_TRY(ptr, txt);
+		ptr->value = 0;
+
+		break;
+	    }
+	}			/* end for (;;) */
+    } else {			/* (*tree) == 0 :: First sequence to be added */
+	savedptr = ptr = (*tree) = typeCalloc(TRIES, 1);
+
+	if (ptr == 0) {
+	    returnCode(ERR);
+	}
+
+	SET_TRY(ptr, txt);
+	ptr->value = 0;
+    }
+
+    /* at this point, we are adding to the try.  ptr->child == 0 */
+
+    while (*txt) {
+	ptr->child = typeCalloc(TRIES, 1);
+
+	ptr = ptr->child;
+
+	if (ptr == 0) {
+	    while ((ptr = savedptr) != 0) {
+		savedptr = ptr->child;
+		free(ptr);
+	    }
+	    returnCode(ERR);
+	}
+
+	SET_TRY(ptr, txt);
+	ptr->value = 0;
+    }
+
+    ptr->value = code;
+    returnCode(OK);
+}