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diff --git a/lib/unicase/cased.c b/lib/unicase/cased.c
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+/* Test whether a Unicode character is cased.
+ Copyright (C) 2002, 2006-2007, 2009-2020 Free Software Foundation, Inc.
+ Written by Bruno Haible <bruno@clisp.org>, 2009.
+
+ This program is free software: you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3 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, see <https://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+/* Specification. */
+#include "caseprop.h"
+
+/* Quoting the Unicode standard:
+ Definition: A character is defined to be "cased" if it has the Lowercase
+ or Uppercase property or has a General_Category value of
+ Titlecase_Letter. */
+
+#if 0
+
+#include "unictype.h"
+
+bool
+uc_is_cased (ucs4_t uc)
+{
+ return (uc_is_property_lowercase (uc)
+ || uc_is_property_uppercase (uc)
+ || uc_is_general_category (uc, UC_TITLECASE_LETTER));
+}
+
+#else
+
+#include "unictype/bitmap.h"
+
+/* Define u_casing_property_cased table. */
+#include "cased.h"
+
+bool
+uc_is_cased (ucs4_t uc)
+{
+ return bitmap_lookup (&u_casing_property_cased, uc);
+}
+
+#endif