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 a0457f883..0619b020c 100644
--- a/os/hal/ports/STM32/LLD/USARTv1/hal_uart_lld.c
+++ b/os/hal/ports/STM32/LLD/USARTv1/hal_uart_lld.c
@@ -348,6 +348,10 @@ static void serve_usart_irq(UARTDriver *uartp) {
     /* End of transmission, a callback is generated.*/
     _uart_tx2_isr_code(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);
 }
 
 /*===========================================================================*/
diff --git a/os/hal/ports/STM32/LLD/USARTv1/hal_uart_lld.h b/os/hal/ports/STM32/LLD/USARTv1/hal_uart_lld.h
index 40e8885d4..ea4047325 100644
--- a/os/hal/ports/STM32/LLD/USARTv1/hal_uart_lld.h
+++ b/os/hal/ports/STM32/LLD/USARTv1/hal_uart_lld.h
@@ -603,6 +603,12 @@ typedef struct {
    */
   uartecb_t                 rxerr_cb;
   /* End of the mandatory fields.*/
+  /**
+   * @brief   Receiver timeout callback.
+   * @details Handles idle interrupts depending on configured
+   *          flags in CR registers and supported hardware features.
+   */
+  uartcb_t                  timeout_cb;
   /**
    * @brief Bit rate.
    */
diff --git a/readme.txt b/readme.txt
index 390077cea..0e9f1ec62 100644
--- a/readme.txt
+++ b/readme.txt
@@ -74,6 +74,7 @@
 *****************************************************************************
 
 *** Next ***
+- HAL: Idle callback support for STM32 USARTv1 UART driver.
 - LIB: Added support for asynchronous jobs queues to OSLIB.
 - LIB: Added support for delegate threads to OSLIB.
 - NIL: Improvements to messages, new functions chMsgWaitS(),