diff --git a/os/hal/platforms/STM32/USARTv2/uart_lld.h b/os/hal/platforms/STM32/USARTv2/uart_lld.h
index 29a5e85da..57fbfd975 100644
--- a/os/hal/platforms/STM32/USARTv2/uart_lld.h
+++ b/os/hal/platforms/STM32/USARTv2/uart_lld.h
@@ -340,15 +340,15 @@ typedef struct {
   /**
    * @brief Initialization value for the CR1 register.
    */
-  uint16_t                  cr1;
+  uint32_t                  cr1;
   /**
    * @brief Initialization value for the CR2 register.
    */
-  uint16_t                  cr2;
+  uint32_t                  cr2;
   /**
    * @brief Initialization value for the CR3 register.
    */
-  uint16_t                  cr3;
+  uint32_t                  cr3;
 } UARTConfig;
 
 /**
diff --git a/readme.txt b/readme.txt
index cf0255124..9b91d0786 100644
--- a/readme.txt
+++ b/readme.txt
@@ -82,6 +82,7 @@
 *****************************************************************************
 
 *** 2.5.1 ***
+- FIX: Fixed wrong type for UART config registers (bug 3579434).
 - FIX: Fixed various typos and wrong limits in the STM32F4/F2 HAL driver
   (bug 3578944)(backported to 2.4.3).
 - FIX: Fixed ARM CMx crt0.c fails at low optimization levels (bug 3578927)