diff --git a/sql/auth/sql_authorization.cc b/sql/auth/sql_authorization.cc
--- a/sql/auth/sql_authorization.cc
+++ b/sql/auth/sql_authorization.cc
@@ -1829,7 +1829,7 @@ bool check_readonly(THD *thd, bool err_if_readonly) {
     Thread is replication slave or skip_read_only check is enabled for the
     command, do not prohibit operation.
   */
-  if (thd->slave_thread || thd->is_cmd_skip_readonly()) return false;
+  if (thd->slave_thread || thd->is_cmd_skip_readonly() || thd->is_system_thread()) return false;
 
   Security_context *sctx = thd->security_context();
   bool is_super =