1 files changed, 1 insertions, 1 deletions
diff --git a/src/grep.c b/src/grep.c
index f9d1d86c..1c452867 100644
--- a/src/grep.c
+++ b/src/grep.c
@@ -2852,7 +2852,7 @@ main (int argc, char **argv)
      (where -F does not work) or if -i and the patterns will not work
      for -iF.  */
   if (matcher == F_MATCHER_INDEX
-      && (MB_CUR_MAX <= 1
+      && (! localeinfo.multibyte
           ? match_words
           : (contains_encoding_error (keys, keycc)
              || (match_icase && !fgrep_icase_available (keys, keycc)))))