diff --git a/ipc/msg.c b/ipc/msg.c
index 085bd58..af42ef8 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -125,6 +125,7 @@
 void msg_exit_ns(struct ipc_namespace *ns)
 {
 	free_ipcs(ns, &msg_ids(ns), freeque);
+	idr_destroy(&ns->ids[IPC_MSG_IDS].ipcs_idr);
 }
 #endif
 
diff --git a/ipc/sem.c b/ipc/sem.c
index 87c2b64..2f2a479 100644
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -129,6 +129,7 @@
 void sem_exit_ns(struct ipc_namespace *ns)
 {
 	free_ipcs(ns, &sem_ids(ns), freeary);
+	idr_destroy(&ns->ids[IPC_SEM_IDS].ipcs_idr);
 }
 #endif
 
diff --git a/ipc/shm.c b/ipc/shm.c
index 11bec62..e9b039f 100644
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -101,6 +101,7 @@
 void shm_exit_ns(struct ipc_namespace *ns)
 {
 	free_ipcs(ns, &shm_ids(ns), do_shm_rmid);
+	idr_destroy(&ns->ids[IPC_SHM_IDS].ipcs_idr);
 }
 #endif