diff --git a/nimble/controller/include/controller/ble_ll_ctrl.h b/nimble/controller/include/controller/ble_ll_ctrl.h
index 0b042a2af..90156d51d 100644
--- a/nimble/controller/include/controller/ble_ll_ctrl.h
+++ b/nimble/controller/include/controller/ble_ll_ctrl.h
@@ -253,7 +253,7 @@ uint8_t ble_ll_ctrl_conn_param_reply(struct ble_ll_conn_sm *connsm,
                                      struct ble_ll_conn_params *req);
 int ble_ll_ctrl_reject_ind_send(struct ble_ll_conn_sm *connsm,
                                 uint8_t rej_opcode, uint8_t err);
-int ble_ll_ctrl_start_enc_send(struct ble_ll_conn_sm *connsm, uint8_t opcode);
+int ble_ll_ctrl_start_enc_send(struct ble_ll_conn_sm *connsm);
 int ble_ll_ctrl_enc_allowed_pdu_rx(struct os_mbuf *rxpdu);
 int ble_ll_ctrl_enc_allowed_pdu_tx(struct os_mbuf_pkthdr *pkthdr);
 int ble_ll_ctrl_tx_done(struct os_mbuf *txpdu, struct ble_ll_conn_sm *connsm);
diff --git a/nimble/controller/src/ble_ll_conn_hci.c b/nimble/controller/src/ble_ll_conn_hci.c
index 92039e4c4..526bad00d 100644
--- a/nimble/controller/src/ble_ll_conn_hci.c
+++ b/nimble/controller/src/ble_ll_conn_hci.c
@@ -1362,7 +1362,7 @@ ble_ll_conn_hci_le_ltk_reply(uint8_t *cmdbuf, uint8_t *rspbuf, uint8_t *rsplen)
 
     swap_buf(connsm->enc_data.enc_block.key, cmdbuf + 2, 16);
     ble_ll_calc_session_key(connsm);
-    ble_ll_ctrl_start_enc_send(connsm, BLE_LL_CTRL_START_ENC_REQ);
+    ble_ll_ctrl_start_enc_send(connsm);
     rc = BLE_ERR_SUCCESS;
 
 ltk_key_cmd_complete:
diff --git a/nimble/controller/src/ble_ll_ctrl.c b/nimble/controller/src/ble_ll_ctrl.c
index b7d28404c..dea90eeb1 100644
--- a/nimble/controller/src/ble_ll_ctrl.c
+++ b/nimble/controller/src/ble_ll_ctrl.c
@@ -1119,7 +1119,7 @@ ble_ll_ctrl_is_start_enc_rsp(struct os_mbuf *txpdu)
 }
 
 /**
- * Called to create and send a LL_START_ENC_REQ or LL_START_ENC_RSP
+ * Called to create and send a LL_START_ENC_REQ
  *
  * @param connsm
  * @param err
@@ -1127,7 +1127,7 @@ ble_ll_ctrl_is_start_enc_rsp(struct os_mbuf *txpdu)
  * @return int
  */
 int
-ble_ll_ctrl_start_enc_send(struct ble_ll_conn_sm *connsm, uint8_t opcode)
+ble_ll_ctrl_start_enc_send(struct ble_ll_conn_sm *connsm)
 {
     int rc;
     struct os_mbuf *om;
@@ -1135,7 +1135,7 @@ ble_ll_ctrl_start_enc_send(struct ble_ll_conn_sm *connsm, uint8_t opcode)
     om = os_msys_get_pkthdr(BLE_LL_CTRL_MAX_PDU_LEN,
                             sizeof(struct ble_mbuf_hdr));
     if (om) {
-        om->om_data[0] = opcode;
+        om->om_data[0] = BLE_LL_CTRL_START_ENC_REQ;
         ble_ll_conn_enqueue_pkt(connsm, om, BLE_LL_LLID_CTRL, 1);
         rc = 0;
     } else {