diff --git a/include/sys/spa_impl.h b/include/sys/spa_impl.h
index 2004166781..366410acf2 100644
--- a/include/sys/spa_impl.h
+++ b/include/sys/spa_impl.h
@@ -481,8 +481,6 @@ extern const char *zfs_deadman_failmode;
 extern uint_t spa_slop_shift;
 extern void spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q,
     task_func_t *func, void *arg, uint_t flags, taskq_ent_t *ent, zio_t *zio);
-extern void spa_taskq_dispatch_sync(spa_t *, zio_type_t t, zio_taskq_type_t q,
-    task_func_t *func, void *arg, uint_t flags);
 extern void spa_load_spares(spa_t *spa);
 extern void spa_load_l2cache(spa_t *spa);
 extern sysevent_t *spa_event_create(spa_t *spa, vdev_t *vd, nvlist_t *hist_nvl,
diff --git a/module/zfs/spa.c b/module/zfs/spa.c
index 9eb14b4f1d..a1258546c8 100644
--- a/module/zfs/spa.c
+++ b/module/zfs/spa.c
@@ -1520,19 +1520,6 @@ spa_taskq_dispatch_ent(spa_t *spa, zio_type_t t, zio_taskq_type_t q,
 	taskq_dispatch_ent(tq, func, arg, flags, ent);
 }
 
-/*
- * Same as spa_taskq_dispatch_ent() but block on the task until completion.
- */
-void
-spa_taskq_dispatch_sync(spa_t *spa, zio_type_t t, zio_taskq_type_t q,
-    task_func_t *func, void *arg, uint_t flags)
-{
-	taskq_t *tq = spa_taskq_dispatch_select(spa, t, q, NULL);
-	taskqid_t id = taskq_dispatch(tq, func, arg, flags);
-	if (id)
-		taskq_wait_id(tq, id);
-}
-
 static void
 spa_create_zio_taskqs(spa_t *spa)
 {