diff --git a/sql/sql_select.cc b/sql/sql_select.cc
index 6a64665b4cc..c330d1e6b54 100644
--- a/sql/sql_select.cc
+++ b/sql/sql_select.cc
@@ -367,8 +367,7 @@ JOIN::prepare(Item ***rref_pointer_array,
       {
 	if (item->with_sum_func)
 	  flag|=1;
-	else if (!(flag & 2) &&
-		 test(item->used_tables() & ~PARAM_TABLE_BIT))
+	else if (!(flag & 2) && !item->const_during_execution())
 	  flag|=2;
       }
       if (flag == 3)