X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/putty/blobdiff_plain/f0fccd51c27b5cbe8990e625a7bdcf9972142d1f..115393d8e6050cc174ef15cc7cfaca23a81a3b89:/ldisc.c

diff --git a/ldisc.c b/ldisc.c
index d57e6d17..f2853f4b 100644
--- a/ldisc.c
+++ b/ldisc.c
@@ -147,7 +147,7 @@ void ldisc_send(void *handle, char *buf, int len, int interactive)
     if (EDITING) {
 	while (len--) {
 	    int c;
-	    c = *buf++ + keyflag;
+	    c = (unsigned char)(*buf++) + keyflag;
 	    if (!interactive && c == '\r')
 		c += KCTRL('@');
 	    switch (ldisc->quotenext ? ' ' : c) {