diff --git a/mysql-test/r/grant.result b/mysql-test/r/grant.result
index d56020c3090..61e9656e6ee 100644
--- a/mysql-test/r/grant.result
+++ b/mysql-test/r/grant.result
@@ -1129,6 +1129,12 @@ DROP USER mysqltest_1@localhost;
 DROP DATABASE db27878;
 use test;
 DROP TABLE t1;
+#
+#  Bug#33275 Server crash when creating temporary table mysql.user
+#
+CREATE TEMPORARY TABLE mysql.user (id INT);
+FLUSH PRIVILEGES;
+DROP TABLE mysql.user;
 drop table if exists test;
 Warnings:
 Note	1051	Unknown table 'test'
diff --git a/mysql-test/t/grant.test b/mysql-test/t/grant.test
index e4b95502143..55f046ffc33 100644
--- a/mysql-test/t/grant.test
+++ b/mysql-test/t/grant.test
@@ -1153,6 +1153,12 @@ DROP DATABASE db27878;
 use test;
 DROP TABLE t1;
 
+--echo #
+--echo #  Bug#33275 Server crash when creating temporary table mysql.user
+--echo #
+CREATE TEMPORARY TABLE mysql.user (id INT);
+FLUSH PRIVILEGES;
+DROP TABLE mysql.user;
 #
 # Bug #33201 Crash occurs when granting update privilege on one column of a view
 #
diff --git a/mysys/my_thr_init.c b/mysys/my_thr_init.c
index c446808c7da..481d72cf3fe 100644
--- a/mysys/my_thr_init.c
+++ b/mysys/my_thr_init.c
@@ -223,7 +223,7 @@ void my_thread_global_end(void)
 #endif
 }
 
-static long thread_id=0;
+static ulong thread_id=0;
 
 /*
   Allocate thread specific memory for the thread, used by mysys and dbug
diff --git a/sql/sql_acl.cc b/sql/sql_acl.cc
index 7592986ef81..e10b339c97f 100644
--- a/sql/sql_acl.cc
+++ b/sql/sql_acl.cc
@@ -558,6 +558,8 @@ my_bool acl_reload(THD *thd)
   tables[0].next_local= tables[0].next_global= tables+1;
   tables[1].next_local= tables[1].next_global= tables+2;
   tables[0].lock_type=tables[1].lock_type=tables[2].lock_type=TL_READ;
+  tables[0].skip_temporary= tables[1].skip_temporary=
+    tables[2].skip_temporary= TRUE;
 
   if (simple_open_n_lock_tables(thd, tables))
   {
@@ -3537,7 +3539,8 @@ my_bool grant_reload(THD *thd)
   tables[0].next_local= tables[0].next_global= tables+1;
   tables[1].next_local= tables[1].next_global= tables+2;
   tables[0].lock_type= tables[1].lock_type= tables[2].lock_type= TL_READ;
-
+  tables[0].skip_temporary= tables[1].skip_temporary=
+    tables[2].skip_temporary= TRUE;
   /*
     To avoid deadlocks we should obtain table locks before
     obtaining LOCK_grant rwlock.