diff --git a/sys/contrib/dev/mediatek/mt76/mt7921/pci.c b/sys/contrib/dev/mediatek/mt76/mt7921/pci.c
index 46b59c4d039..b70335aba6b 100644
--- a/sys/contrib/dev/mediatek/mt76/mt7921/pci.c
+++ b/sys/contrib/dev/mediatek/mt76/mt7921/pci.c
@@ -51,6 +51,17 @@ static void mt7921e_unregister_device(struct mt792x_dev *dev)
 	if (dev->phy.chip_cap & MT792x_CHIP_CAP_WF_RF_PIN_CTRL_EVT_EN)
 		wiphy_rfkill_stop_polling(hw->wiphy);
 
+#if defined(__FreeBSD__)
+	/*
+	 * Prevent scheduling ps_work again in mt76_connac_power_save_sched().
+	 * Otherwise upon shutdown we may have delayed work pending, which on
+	 * FreeBSD means there is a callout running, but the ps_work will be
+	 * freed along with the mt792x_dev and so there is a callout on a list
+	 * which no longer exists.
+	 */
+	pm->enable = false;
+#endif
+
 	cancel_work_sync(&dev->init_work);
 	mt76_unregister_device(&dev->mt76);
 	mt76_for_each_q_rx(&dev->mt76, i)