diff --git a/terminal.c b/terminal.c
index 59500725..1446fa21 100644
--- a/terminal.c
+++ b/terminal.c
@@ -3309,7 +3309,7 @@ static void clipme(Terminal *term, pos top, pos bottom, int rect)
 		    int rv;
 		    if (is_dbcs_leadbyte(font_codepage, (BYTE) c)) {
 			buf[0] = c;
-			buf[1] = ldata[top.x + 1];
+			buf[1] = (char) (0xFF & ldata[top.x + 1]);
 			rv = mb_to_wc(font_codepage, 0, buf, 2, wbuf, 4);
 			top.x++;
 		    } else {