1 files changed, 1 insertions, 0 deletions
diff --git a/sql/item.cc b/sql/item.cc
index 04496338b8f..ec4c2e6e662 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -4475,6 +4475,7 @@ void Item_field::cleanup()
     I.e. we can drop 'field'.
    */
   field= result_field= 0;
+  item_equal= NULL;
   null_value= FALSE;
   DBUG_VOID_RETURN;
 }