diff --git a/include/sys/zfs_context.h b/include/sys/zfs_context.h
index 761b1d57a1..8b9a5f46fb 100644
--- a/include/sys/zfs_context.h
+++ b/include/sys/zfs_context.h
@@ -468,6 +468,7 @@ extern void	taskq_init_ent(taskq_ent_t *);
 extern void	taskq_destroy(taskq_t *);
 extern void	taskq_wait(taskq_t *);
 extern void	taskq_wait_id(taskq_t *, taskqid_t);
+extern void	taskq_wait_outstanding(taskq_t *, taskqid_t);
 extern int	taskq_member(taskq_t *, kthread_t *);
 extern int	taskq_cancel_id(taskq_t *, taskqid_t);
 extern void	system_taskq_init(void);
diff --git a/lib/libzpool/taskq.c b/lib/libzpool/taskq.c
index d63bc28e23..c6fa2fff72 100644
--- a/lib/libzpool/taskq.c
+++ b/lib/libzpool/taskq.c
@@ -220,6 +220,12 @@ taskq_wait_id(taskq_t *tq, taskqid_t id)
 	taskq_wait(tq);
 }
 
+void
+taskq_wait_outstanding(taskq_t *tq, taskqid_t id)
+{
+	taskq_wait(tq);
+}
+
 static void
 taskq_thread(void *arg)
 {