Index: head/lib/libedit/chartype.h
===================================================================
--- head/lib/libedit/chartype.h
+++ head/lib/libedit/chartype.h
@@ -56,6 +56,7 @@
 
 #define ct_wctob             wctob
 #define ct_wctomb            wctomb
+#define ct_wcrtomb           wcrtomb
 #define ct_wctomb_reset      wctomb(0,0)
 #define ct_wcstombs          wcstombs
 #define ct_mbstowcs          mbstowcs
@@ -109,6 +110,7 @@
 
 #define ct_wctob(w)          ((int)(w))
 #define ct_wctomb            error
+#define ct_wcrtomb           error
 #define ct_wctomb_reset
 #define ct_wcstombs(a, b, c)    (strncpy(a, b, c), strlen(a))
 #define ct_mbstowcs(a, b, c)    (strncpy(a, b, c), strlen(a))
Index: head/lib/libedit/chartype.c
===================================================================
--- head/lib/libedit/chartype.c
+++ head/lib/libedit/chartype.c
@@ -37,6 +37,7 @@
 __FBSDID("$FreeBSD$");
 
 #include <ctype.h>
+#include <limits.h>
 #include <stdlib.h>
 #include <string.h>
 
@@ -182,17 +183,13 @@
 protected size_t
 ct_enc_width(Char c)
 {
-	/* UTF-8 encoding specific values */
-	if (c < 0x80)
-		return 1;
-	else if (c < 0x0800)
-		return 2;
-	else if (c < 0x10000)
-		return 3;
-	else if (c < 0x110000)
-		return 4;
-	else
-		return 0; /* not a valid codepoint */
+	mbstate_t ps = (mbstate_t){{0}};
+	size_t len;
+	char cbuf[MB_LEN_MAX];
+	len = ct_wcrtomb(cbuf, c, &ps);
+	if (len == (size_t)-1)
+		return (0);
+	return (len);
 }
 
 protected ssize_t
Index: head/lib/libedit/el.h
===================================================================
--- head/lib/libedit/el.h
+++ head/lib/libedit/el.h
@@ -56,7 +56,6 @@
 #define	NO_TTY		0x02
 #define	EDIT_DISABLED	0x04
 #define	UNBUFFERED	0x08
-#define	CHARSET_IS_UTF8 0x10
 #define	NARROW_HISTORY	0x40
 
 typedef unsigned char el_action_t;	/* Index to command array	*/
Index: head/lib/libedit/el.c
===================================================================
--- head/lib/libedit/el.c
+++ head/lib/libedit/el.c
@@ -99,10 +99,6 @@
          * Initialize all the modules. Order is important!!!
          */
 	el->el_flags = 0;
-	if (setlocale(LC_CTYPE, NULL) != NULL){
-		if (strcmp(nl_langinfo(CODESET), "UTF-8") == 0)
-			el->el_flags |= CHARSET_IS_UTF8;
-	}
 
 	if (terminal_init(el) == -1) {
 		el_free(el->el_prog);
@@ -293,7 +289,7 @@
 		void *ptr = va_arg(ap, void *);
 
 		rv = hist_set(el, func, ptr);
-		if (!(el->el_flags & CHARSET_IS_UTF8))
+		if (MB_CUR_MAX == 1)
 			el->el_flags &= ~NARROW_HISTORY;
 		break;
 	}
Index: head/lib/libedit/read.c
===================================================================
--- head/lib/libedit/read.c
+++ head/lib/libedit/read.c
@@ -363,13 +363,7 @@
 				goto again;
 			}
 		case (size_t)-2:
-			/*
-			 * We don't support other multibyte charsets.
-			 * The second condition shouldn't happen
-			 * and is here merely for additional safety.
-			 */
-			if ((el->el_flags & CHARSET_IS_UTF8) == 0 ||
-			    cbp >= MB_LEN_MAX) {
+			if (cbp >= MB_LEN_MAX) {
 				errno = EILSEQ;
 				*cp = L'\0';
 				return -1;