diff --git a/sql/sql_lex.cc b/sql/sql_lex.cc
index fea16dccd4a97713e6d0d205dc297a54765cdc28..65c958093bd658c1fec09e78c1bcfe70d30312c9 100644
--- a/sql/sql_lex.cc
+++ b/sql/sql_lex.cc
@@ -1177,7 +1177,6 @@ void st_select_lex_unit::exclude_level()
 */
 void st_select_lex_unit::exclude_tree()
 {
-  SELECT_LEX_UNIT *units= 0;
   for (SELECT_LEX *sl= first_select(); sl; sl= sl->next_select())
   {
     // unlink current level from global SELECTs list