diff --git a/os/hal/ports/STM32/LLD/USARTv1/hal_uart_lld.c b/os/hal/ports/STM32/LLD/USARTv1/hal_uart_lld.c
index 0619b020c..eaaeeda36 100644
--- a/os/hal/ports/STM32/LLD/USARTv1/hal_uart_lld.c
+++ b/os/hal/ports/STM32/LLD/USARTv1/hal_uart_lld.c
@@ -350,8 +350,9 @@ static void serve_usart_irq(UARTDriver *uartp) {
   }
 
   /* Timeout interrupt sources are only checked if enabled in CR1.*/
-  if ((cr1 & USART_CR1_IDLEIE) && (sr & USART_SR_IDLE))
-      _uart_timeout_isr_code(uartp);
+  if ((cr1 & USART_CR1_IDLEIE) && (sr & USART_SR_IDLE)) {
+    _uart_timeout_isr_code(uartp);
+  }
 }
 
 /*===========================================================================*/
diff --git a/testhal/STM32/multi/UART/cfg/stm32f407_discovery/portab.c b/testhal/STM32/multi/UART/cfg/stm32f407_discovery/portab.c
index 76d1f193c..5962bfc0b 100644
--- a/testhal/STM32/multi/UART/cfg/stm32f407_discovery/portab.c
+++ b/testhal/STM32/multi/UART/cfg/stm32f407_discovery/portab.c
@@ -49,6 +49,7 @@ UARTConfig uart_cfg_1 = {
   NULL,
   NULL,
   NULL,
+  NULL,
   38400,
   0,
   USART_CR2_LINEN,