1 files changed, 2 insertions, 1 deletions

diff --git a/src/fns.c b/src/fns.c
index 76455feb10e..53f980c1e97 100644
--- a/src/fns.c
+++ b/src/fns.c
@@ -711,7 +711,8 @@ concat (nargs, args, target_type, last_special)
                     XSETFASTINT (elt, XSTRING (this)->data[thisindex++]);
                     if (some_multibyte
                         && (XINT (elt) >= 0240
-                            || ! NILP (Vnonascii_translation_table))
+                            || (XINT (elt) >= 0200
+                                && ! NILP (Vnonascii_translation_table)))
                         && XINT (elt) < 0400)
                       {
                         c = unibyte_char_to_multibyte (XINT (elt));