diff --git a/nimble/controller/src/ble_ll_adv.c b/nimble/controller/src/ble_ll_adv.c
index 7475d63b0..4629b40e6 100644
--- a/nimble/controller/src/ble_ll_adv.c
+++ b/nimble/controller/src/ble_ll_adv.c
@@ -956,7 +956,6 @@ ble_ll_adv_secondary_tx_start_cb(struct ble_ll_sched_item *sch)
     }
 
 #if (MYNEWT_VAL(BLE_LL_CFG_FEAT_LE_ENCRYPTION) == 1)
-    /* XXX: automatically do this in the phy based on channel? */
     ble_phy_encrypt_disable();
 #endif