diff --git a/mysql-test/suite/innodb/disabled.def b/mysql-test/suite/innodb/disabled.def
index 86fb2946bc9..23f53b26d33 100644
--- a/mysql-test/suite/innodb/disabled.def
+++ b/mysql-test/suite/innodb/disabled.def
@@ -12,5 +12,4 @@
 
 innodb.auto_increment_dup : MDEV-10548
 innodb_skip_innodb_is_tables : MDEV-10200
-innodb.defrag_mdl-9155 : MDEV-10551
 innodb_defragment_fill_factor : MDEV-10771
\ No newline at end of file
diff --git a/storage/innobase/handler/ha_innodb.cc b/storage/innobase/handler/ha_innodb.cc
index 9615e7f5386..f8c1273375f 100644
--- a/storage/innobase/handler/ha_innodb.cc
+++ b/storage/innobase/handler/ha_innodb.cc
@@ -3351,6 +3351,7 @@ ha_innobase::ha_innobase(
 		*/
 			  | HA_CAN_EXPORT
 			  | HA_CAN_RTREEKEYS
+                          | HA_CONCURRENT_OPTIMIZE
 		/* JAN: TODO: MySQL 5.7
 			  | HA_HAS_RECORDS
 			  | HA_NO_READ_LOCAL_LOCK