diff --git a/port/posix-h5-bcm/main.c b/port/posix-h5-bcm/main.c
index c54dce284..6adeed645 100644
--- a/port/posix-h5-bcm/main.c
+++ b/port/posix-h5-bcm/main.c
@@ -82,6 +82,7 @@ static hci_transport_config_uart_t transport_config = {
     921600,  // main baudrate
     0,       // flow control
     NULL,
+    BTSTACK_UART_PARITY_EVEN, // parity
 };
 static btstack_uart_config_t uart_config;
 
diff --git a/port/posix-h5/main.c b/port/posix-h5/main.c
index 360e2e982..642ffd844 100644
--- a/port/posix-h5/main.c
+++ b/port/posix-h5/main.c
@@ -85,6 +85,7 @@ static hci_transport_config_uart_t config = {
     0,  // main baudrate
     1,  // flow control
     NULL,
+    BTSTACK_UART_PARITY_EVEN, // parity
 };
 
 static btstack_packet_callback_registration_t hci_event_callback_registration;
@@ -225,9 +226,6 @@ int main(int argc, const char * argv[]){
     const hci_transport_t * transport = hci_transport_h5_instance(uart_driver);
 	hci_init(transport, (void*) &config);
 
-    // enable BCSP mode for CSR chipsets - auto detect might not work
-    // hci_transport_h5_enable_bcsp_mode();
-
     // set BD_ADDR for CSR without Flash/unique address
     // bd_addr_t own_address = { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66};
     // btstack_chipset_csr_set_bd_addr(own_address);