1 files changed, 1 insertions, 1 deletions
diff --git a/sql/filesort.cc b/sql/filesort.cc
index ad891db3991..d2166ad701c 100644
--- a/sql/filesort.cc
+++ b/sql/filesort.cc
@@ -834,7 +834,7 @@ static void make_sortkey(register SORTPARAM *param,
         if (sort_field->need_strxnfrm)
         {
           char *from=(char*) res->ptr();
-          uint tmp_length;
+          uint tmp_length __attribute__((unused));
           if ((uchar*) from == to)
           {
             set_if_smaller(length,sort_field->length);