1 files changed, 1 insertions, 1 deletions

diff --git a/src/fns.c b/src/fns.c
index 779c4af9d43..a958ba20f16 100644
--- a/src/fns.c
+++ b/src/fns.c
@@ -668,7 +668,7 @@ concat (nargs, args, target_type, last_special)
           if (some_multibyte
               && toindex_byte > 0
               && !ASCII_BYTE_P (XSTRING (val)->data[toindex_byte - 1])
-              && !CHAR_HEAD_P (XSTRING (this)->data[0] >= 0xA0))
+              && !CHAR_HEAD_P (XSTRING (this)->data[0]))
             maybe_combine_byte = 1;
           toindex_byte += thislen_byte;
           toindex += thisleni;