diff --git a/subsys/bluetooth/controller/ll_sw/ull_conn.c b/subsys/bluetooth/controller/ll_sw/ull_conn.c
index 5e5652d192b..d2dae65b321 100644
--- a/subsys/bluetooth/controller/ll_sw/ull_conn.c
+++ b/subsys/bluetooth/controller/ll_sw/ull_conn.c
@@ -4157,6 +4157,13 @@ static inline void ctrl_tx_ack(struct ll_conn *conn, struct node_tx **tx,
 		}
 		break;
 
+	case PDU_DATA_LLCTRL_TYPE_REJECT_EXT_IND:
+		if (pdu_tx->llctrl.reject_ext_ind.reject_opcode !=
+		    PDU_DATA_LLCTRL_TYPE_ENC_REQ) {
+			break;
+		}
+		/* Pass through */
+
 	case PDU_DATA_LLCTRL_TYPE_REJECT_IND:
 		/* resume data packet rx and tx */
 		conn->pause_rx = 0U;