diff --git a/mysql-test/r/not_partition.result b/mysql-test/r/not_partition.result
index 8bff8708a86..3d6f3fe39a3 100644
--- a/mysql-test/r/not_partition.result
+++ b/mysql-test/r/not_partition.result
@@ -85,3 +85,17 @@ explain partitions select * from t1 where a='a ' OR a='a';
 id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	5	Using where
 drop table t1;
+#
+# bug#11760213-52599: ALTER TABLE REMOVE PARTITIONING ON NON-PARTITIONED
+#                                 TABLE CORRUPTS MYISAM
+DROP TABLE if exists `t1`;
+CREATE TABLE  `t1`(`a` INT)ENGINE=myisam;
+ALTER TABLE `t1` ADD COLUMN `b` INT;
+CREATE UNIQUE INDEX `i1` ON `t1`(`b`);
+CREATE UNIQUE INDEX `i2` ON `t1`(`a`);
+ALTER TABLE `t1` ADD PRIMARY KEY  (`a`);
+ALTER TABLE `t1` REMOVE PARTITIONING;
+CHECK TABLE `t1` EXTENDED;
+Table	Op	Msg_type	Msg_text
+test.t1	check	status	OK
+DROP TABLE t1;
diff --git a/mysql-test/r/partition_disabled.result b/mysql-test/r/partition_disabled.result
index edf3a56d9b2..c78552beb9d 100644
--- a/mysql-test/r/partition_disabled.result
+++ b/mysql-test/r/partition_disabled.result
@@ -91,3 +91,18 @@ explain partitions select * from t1 where a='a ' OR a='a';
 id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	NULL	ALL	NULL	NULL	NULL	NULL	5	Using where
 drop table t1;
+#
+# bug#11760213-52599: ALTER TABLE REMOVE PARTITIONING ON NON-PARTITIONED
+#                                 TABLE CORRUPTS MYISAM
+DROP TABLE if exists `t1`;
+CREATE TABLE  `t1`(`a` INT)ENGINE=myisam;
+ALTER TABLE `t1` ADD COLUMN `b` INT;
+CREATE UNIQUE INDEX `i1` ON `t1`(`b`);
+CREATE UNIQUE INDEX `i2` ON `t1`(`a`);
+ALTER TABLE `t1` ADD PRIMARY KEY  (`a`);
+ALTER TABLE `t1` REMOVE PARTITIONING;
+ERROR HY000: Partition management on a not partitioned table is not possible
+CHECK TABLE `t1` EXTENDED;
+Table	Op	Msg_type	Msg_text
+test.t1	check	status	OK
+DROP TABLE t1;
diff --git a/mysql-test/t/not_partition.test b/mysql-test/t/not_partition.test
index a4faa794e3d..dd52e4b97e6 100644
--- a/mysql-test/t/not_partition.test
+++ b/mysql-test/t/not_partition.test
@@ -84,3 +84,17 @@ create table t1 (a varchar(10) charset latin1 collate latin1_bin);
 insert into t1 values (''),(' '),('a'),('a '),('a  ');
 explain partitions select * from t1 where a='a ' OR a='a';
 drop table t1;
+--echo #
+--echo # bug#11760213-52599: ALTER TABLE REMOVE PARTITIONING ON NON-PARTITIONED
+--echo #                                 TABLE CORRUPTS MYISAM
+--disable_warnings
+DROP TABLE if exists `t1`;
+--enable_warnings
+CREATE TABLE  `t1`(`a` INT)ENGINE=myisam;
+ALTER TABLE `t1` ADD COLUMN `b` INT;
+CREATE UNIQUE INDEX `i1` ON `t1`(`b`);
+CREATE UNIQUE INDEX `i2` ON `t1`(`a`);
+ALTER TABLE `t1` ADD PRIMARY KEY  (`a`);
+ALTER TABLE `t1` REMOVE PARTITIONING;
+CHECK TABLE `t1` EXTENDED;
+DROP TABLE t1;
diff --git a/mysql-test/t/partition_disabled.test b/mysql-test/t/partition_disabled.test
index c3e6cd5119f..940aea105ce 100644
--- a/mysql-test/t/partition_disabled.test
+++ b/mysql-test/t/partition_disabled.test
@@ -85,3 +85,20 @@ create table t1 (a varchar(10) charset latin1 collate latin1_bin);
 insert into t1 values (''),(' '),('a'),('a '),('a  ');
 explain partitions select * from t1 where a='a ' OR a='a';
 drop table t1;
+
+--echo #
+--echo # bug#11760213-52599: ALTER TABLE REMOVE PARTITIONING ON NON-PARTITIONED
+--echo #                                 TABLE CORRUPTS MYISAM
+--disable_warnings
+DROP TABLE if exists `t1`;
+--enable_warnings
+CREATE TABLE  `t1`(`a` INT)ENGINE=myisam;
+ALTER TABLE `t1` ADD COLUMN `b` INT;
+CREATE UNIQUE INDEX `i1` ON `t1`(`b`);
+CREATE UNIQUE INDEX `i2` ON `t1`(`a`);
+ALTER TABLE `t1` ADD PRIMARY KEY  (`a`);
+--error ER_PARTITION_MGMT_ON_NONPARTITIONED
+ALTER TABLE `t1` REMOVE PARTITIONING;
+CHECK TABLE `t1` EXTENDED;
+DROP TABLE t1;
+