diff --git a/os/hal/platforms/STM32F4xx/adc_lld.c b/os/hal/platforms/STM32F4xx/adc_lld.c
index fef357c3b..1398ea4f3 100644
--- a/os/hal/platforms/STM32F4xx/adc_lld.c
+++ b/os/hal/platforms/STM32F4xx/adc_lld.c
@@ -399,6 +399,7 @@ void adcSTM32DisableTSVREFE(void) {
  * @brief   Enables the VBATE bit.
  * @details The VBATE bit is required in order to sample the VBAT channel.
  * @note    This is an STM32-only functionality.
+ * @note    This function is meant to be called after @p adcStart().
  */
 void adcSTM32EnableVBATE(void) {
 
@@ -409,6 +410,7 @@ void adcSTM32EnableVBATE(void) {
  * @brief   Disables the VBATE bit.
  * @details The VBATE bit is required in order to sample the VBAT channel.
  * @note    This is an STM32-only functionality.
+ * @note    This function is meant to be called after @p adcStart().
  */
 void adcSTM32DisableVBATE(void) {
 
diff --git a/readme.txt b/readme.txt
index fc5e8d493..a1d689092 100644
--- a/readme.txt
+++ b/readme.txt
@@ -82,7 +82,10 @@
 *****************************************************************************
 
 *** 2.5.2 ***
-- FIX: Fixed duplicated code in hal_lld.h (STM32F4xx) (bug 3602544).
+- FIX: Fixed adcSTM32EnableTSVREFE must be called AFTER adcStart (bug
+  3602950).
+- FIX: Fixed duplicated code in hal_lld.h (STM32F4xx) (bug 3602544)
+  (backported to 2.4.4).
 - FIX: Fixed #define typo in usb_lld.h (OTGv1) (bug 3602306).
 - FIX: Fixed STM32F0 RCC enable/disable/reset functions for CRC and WWDG
   (bug 3602150).