diff --git a/port/wiced-h4/main.c b/port/wiced-h4/main.c
index dd23413fb..87dc80c76 100644
--- a/port/wiced-h4/main.c
+++ b/port/wiced-h4/main.c
@@ -59,7 +59,7 @@ static btstack_packet_callback_registration_t hci_event_callback_registration;
 static const hci_transport_config_uart_t hci_transport_config_uart = {
     HCI_TRANSPORT_CONFIG_UART,
     115200,
-    2000000,    // 300000+ didn't work reliably, the 48 MHz UART config might be needed for this
+    1000000,    // 200000+ didn't work reliably
     1,
     NULL,
 };
diff --git a/port/wiced-h5/main.c b/port/wiced-h5/main.c
index 2fd5eaff8..ac6a161ae 100644
--- a/port/wiced-h5/main.c
+++ b/port/wiced-h5/main.c
@@ -65,7 +65,7 @@ static btstack_uart_config_t uart_config;
 static const hci_transport_config_uart_t transport_config = {
     HCI_TRANSPORT_CONFIG_UART,
     115200,
-    200000,    // 300000+ didn't work reliably, the 48 MHz UART config might be needed for this
+    1000000,    // 200000+ didn't work reliably
     0,
     NULL,
 };