diff --git a/utf8.c b/utf8.c
index 458363b8..f43945e6 100644
--- a/utf8.c
+++ b/utf8.c
@@ -216,7 +216,11 @@ utf8_width(struct utf8_data *ud, int *width)
 {
 	wchar_t	wc;
 
+#ifdef HAVE_UTF8PROC
+	switch (utf8proc_mbtowc(&wc, ud->data, ud->size)) {
+#else
 	switch (mbtowc(&wc, ud->data, ud->size)) {
+#endif
 	case -1:
 		log_debug("UTF-8 %.*s, mbtowc() %d", (int)ud->size, ud->data,
 		    errno);
@@ -225,7 +229,11 @@ utf8_width(struct utf8_data *ud, int *width)
 	case 0:
 		return (UTF8_ERROR);
 	}
+#ifdef HAVE_UTF8PROC
+	*width = utf8proc_wcwidth(wc);
+#else
 	*width = wcwidth(wc);
+#endif
 	if (*width >= 0 && *width <= 0xff)
 		return (UTF8_DONE);
 	log_debug("UTF-8 %.*s, wcwidth() %d", (int)ud->size, ud->data, *width);