diff --git a/drivers/bluetooth/hci/hci_silabs_efr32.c b/drivers/bluetooth/hci/hci_silabs_efr32.c
index a8464c553ab..d345b98da24 100644
--- a/drivers/bluetooth/hci/hci_silabs_efr32.c
+++ b/drivers/bluetooth/hci/hci_silabs_efr32.c
@@ -32,6 +32,9 @@ struct hci_data {
 #else
 #define CTLR_RL_SIZE 0
 #endif
+#if !defined(CONFIG_BT_CTLR_RL_SIZE)
+#define CONFIG_BT_CTLR_RL_SIZE 0
+#endif
 
 static K_KERNEL_STACK_DEFINE(slz_ll_stack, CONFIG_BT_SILABS_EFR32_ACCEPT_LINK_LAYER_STACK_SIZE);
 static struct k_thread slz_ll_thread;
@@ -249,6 +252,10 @@ static int slz_bt_open(const struct device *dev, bt_hci_recv_t recv)
 		}
 	}
 
+	if (IS_ENABLED(CONFIG_BT_CTLR_PRIVACY)) {
+		sl_btctrl_hci_parser_init_privacy();
+	}
+
 	hci->recv = recv;
 
 	LOG_DBG("SiLabs BT HCI started");