diff --git a/src/freertos_drivers/st/Stm32Uart.cxx b/src/freertos_drivers/st/Stm32Uart.cxx
index 10cfd784c..fcee7849b 100644
--- a/src/freertos_drivers/st/Stm32Uart.cxx
+++ b/src/freertos_drivers/st/Stm32Uart.cxx
@@ -33,6 +33,7 @@
 
 #include "Stm32Uart.hxx"
 
+#include "freertos/tc_ioctl.h"
 #include "stm32f_hal_conf.hxx"
 
 #if defined(STM32F072xB) || defined(STM32F091xC)
@@ -232,6 +233,21 @@ void Stm32Uart::disable()
     HAL_UART_DeInit(&uartHandle); 
 }
 
+int Stm32Uart::ioctl(File *file, unsigned long int key, unsigned long data)
+{
+    switch (key)
+    {
+        default:
+            return -EINVAL;
+        case TCBAUDRATE:
+            uartHandle.Init.BaudRate = data;
+            volatile auto ret = HAL_UART_Init(&uartHandle);
+            HASSERT(HAL_OK == ret);
+            break;
+    }
+    return 0;
+}
+
 /** Try and transmit a message.
  */
 void Stm32Uart::tx_char()
diff --git a/src/freertos_drivers/st/Stm32Uart.hxx b/src/freertos_drivers/st/Stm32Uart.hxx
index e7998057c..0ff8c87a9 100644
--- a/src/freertos_drivers/st/Stm32Uart.hxx
+++ b/src/freertos_drivers/st/Stm32Uart.hxx
@@ -63,6 +63,10 @@ public:
      */
     static void interrupt_handler(unsigned index);
 
+    /** Request an ioctl transaction. Supported ioctl is TCBAUDRATE from
+     * include/freertos/tc_ioctl.h */
+    int ioctl(File *file, unsigned long int key, unsigned long data) override;
+
 private:
     void enable() override; /**< function to enable device */
     void disable() override; /**< function to disable device */