diff -U0 openssh-6.1p1/ChangeLog.sftp-multibyte openssh-6.1p1/ChangeLog
--- openssh-6.1p1/ChangeLog.sftp-multibyte	2013-06-19 17:32:22.527999462 +0200
+++ openssh-6.1p1/ChangeLog	2013-06-19 17:34:12.236533762 +0200
@@ -0,0 +1,8 @@
+20130605
+   - dtucker@cvs.openbsd.org 2013/06/04 20:42:36
+     [sftp.c]
+     Make sftp's libedit interface marginally multibyte aware by building up
+     the quoted string by character instead of by byte.  Prevents failures
+     when linked against a libedit built with wide character support (bz#1990).
+     "looks ok" djm
+
diff -up openssh-6.1p1/sftp.c.sftp-multibyte openssh-6.1p1/sftp.c
--- openssh-6.1p1/sftp.c.sftp-multibyte	2013-06-19 17:32:22.353000206 +0200
+++ openssh-6.1p1/sftp.c	2013-06-19 17:36:46.947876920 +0200
@@ -38,6 +38,7 @@
 #ifdef HAVE_LIBGEN_H
 #include <libgen.h>
 #endif
+#include <locale.h>
 #ifdef USE_LIBEDIT
 #include <histedit.h>
 #else
@@ -1694,8 +1695,9 @@ complete_match(EditLine *el, struct sftp
     char *file, int remote, int lastarg, char quote, int terminated)
 {
 	glob_t g;
-	char *tmp, *tmp2, ins[3];
+	char *tmp, *tmp2, ins[8];
 	u_int i, hadglob, pwdlen, len, tmplen, filelen;
+	int clen;
 	const LineInfo *lf;
 	
 	/* Glob from "file" location */
@@ -1751,10 +1753,13 @@ complete_match(EditLine *el, struct sftp
 		tmp2 = tmp + filelen;
 		len = strlen(tmp2); 
 		/* quote argument on way out */
-		for (i = 0; i < len; i++) {
+		for (i = 0; i < len; i += clen) {
+			if ((clen = mblen(tmp2 + i, len - i)) < 0 ||
+			    (size_t)clen > sizeof(ins) - 2)
+				fatal("invalid multibyte character");
 			ins[0] = '\\';
-			ins[1] = tmp2[i];
-			ins[2] = '\0';
+			memcpy(ins + 1, tmp2 + i, clen);
+			ins[clen + 1] = '\0';
 			switch (tmp2[i]) {
 			case '\'':
 			case '"':
@@ -2096,6 +2101,7 @@ main(int argc, char **argv)
 
 	/* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
 	sanitise_stdfd();
+	setlocale(LC_CTYPE, "");
 
 	__progname = ssh_get_progname(argv[0]);
 	memset(&args, '\0', sizeof(args));