diff --git a/chipset-cc256x/bt_control_cc256x.c b/chipset-cc256x/bt_control_cc256x.c
index d7b3b3913..d756291d3 100644
--- a/chipset-cc256x/bt_control_cc256x.c
+++ b/chipset-cc256x/bt_control_cc256x.c
@@ -239,7 +239,7 @@ static const hci_uart_config_t hci_uart_config_cc256x = {
     NULL,
     115200,
     1000000,
-    NULL
+    0
 };
 
 // MARK: public API