diff --git a/mysql-test/r/innodb-deadlock.result b/mysql-test/r/innodb-deadlock.result
index 2ca82101fb4..b6a3373e8c6 100644
--- a/mysql-test/r/innodb-deadlock.result
+++ b/mysql-test/r/innodb-deadlock.result
@@ -94,3 +94,14 @@ id	x
 300	300
 commit;
 drop table t1, t2;
+End of 4.1 tests
+set storage_engine=innodb;
+drop table if exists a;
+drop table if exists A;
+create table A (c int);
+insert into A (c) values (0);
+create table a as select * from A;
+drop table A;
+drop table if exists a;
+set storage_engine=default;
+End of 5.0 tests.
diff --git a/mysql-test/t/innodb-deadlock.test b/mysql-test/t/innodb-deadlock.test
index 81acfba5c93..1a184f98771 100644
--- a/mysql-test/t/innodb-deadlock.test
+++ b/mysql-test/t/innodb-deadlock.test
@@ -112,4 +112,29 @@ commit;
 
 drop table t1, t2;
 
-# End of 4.1 tests
+--echo End of 4.1 tests
+
+#
+# Bug#25164 create table `a` as select * from `A` hangs
+#
+
+set storage_engine=innodb;
+
+--disable_warnings
+drop table if exists a;
+drop table if exists A;
+--enable_warnings
+
+create table A (c int);
+insert into A (c) values (0);
+--error 0,ER_LOCK_DEADLOCK,ER_UPDATE_TABLE_USED
+create table a as select * from A;
+drop table A;
+
+--disable_warnings
+drop table if exists a;
+--enable_warnings
+
+set storage_engine=default;
+
+--echo End of 5.0 tests.
diff --git a/sql/lock.cc b/sql/lock.cc
index 0036d0aef77..cf06be5f95f 100644
--- a/sql/lock.cc
+++ b/sql/lock.cc
@@ -172,6 +172,8 @@ MYSQL_LOCK *mysql_lock_tables(THD *thd, TABLE **tables, uint count,
                                                      thd->lock_id)];
     if (rc > 1)                                 /* a timeout or a deadlock */
     {
+      if (sql_lock->table_count)
+        VOID(unlock_external(thd, sql_lock->table, sql_lock->table_count));
       my_error(rc, MYF(0));
       my_free((gptr) sql_lock,MYF(0));
       sql_lock= 0;