1 files changed, 1 insertions, 0 deletions
diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy
index eae83f3ee18..93663e32158 100644
--- a/sql/sql_yacc.yy
+++ b/sql/sql_yacc.yy
@@ -6032,6 +6032,7 @@ field_type_or_serial:
             Lex->last_field->set_handler(&type_handler_ulonglong);
             Lex->last_field->flags|= AUTO_INCREMENT_FLAG | NOT_NULL_FLAG
                                      | UNSIGNED_FLAG | UNIQUE_KEY_FLAG;
+            Lex->alter_info.flags|= ALTER_ADD_INDEX;
           }
           opt_serial_attribute
         ;