diff --git a/os/hal/ports/STM32/STM32F4xx/hal_lld.h b/os/hal/ports/STM32/STM32F4xx/hal_lld.h
index 2bc06ef3d..bc7556b4c 100644
--- a/os/hal/ports/STM32/STM32F4xx/hal_lld.h
+++ b/os/hal/ports/STM32/STM32F4xx/hal_lld.h
@@ -398,12 +398,6 @@
 #define STM32_MCO2SEL_HSE       (2U << 30)  /**< HSE clock on MCO2 pin.     */
 #define STM32_MCO2SEL_PLL       (3U << 30)  /**< PLL clock on MCO2 pin.     */
 
-#define STM32_RTC_NOCLOCK       (0 << 8)    /**< No clock.                  */
-#define STM32_RTC_LSE           (1 << 8)    /**< LSE used as RTC clock.     */
-#define STM32_RTC_LSI           (2 << 8)    /**< LSI used as RTC clock.     */
-#define STM32_RTC_HSE           (3 << 8)    /**< HSE divided by programmable
-                                                 prescaler used as RTC clock*/
-
 /**
  * @name    RCC_PLLI2SCFGR register bits definitions
  * @{
diff --git a/os/hal/ports/STM32/STM32F7xx/hal_lld.h b/os/hal/ports/STM32/STM32F7xx/hal_lld.h
index 7b1232a19..b850f51d4 100644
--- a/os/hal/ports/STM32/STM32F7xx/hal_lld.h
+++ b/os/hal/ports/STM32/STM32F7xx/hal_lld.h
@@ -270,12 +270,6 @@
 #define STM32_MCO2SEL_HSE       (2U << 30)  /**< HSE clock on MCO2 pin.     */
 #define STM32_MCO2SEL_PLL       (3U << 30)  /**< PLL clock on MCO2 pin.     */
 
-#define STM32_RTC_NOCLOCK       (0 << 8)    /**< No clock.                  */
-#define STM32_RTC_LSE           (1 << 8)    /**< LSE used as RTC clock.     */
-#define STM32_RTC_LSI           (2 << 8)    /**< LSI used as RTC clock.     */
-#define STM32_RTC_HSE           (3 << 8)    /**< HSE divided by programmable
-                                                 prescaler used as RTC clock*/
-
 /**
  * @name    RCC_PLLI2SCFGR register bits definitions
  * @{
diff --git a/readme.txt b/readme.txt
index b1db31d96..af4422c9e 100644
--- a/readme.txt
+++ b/readme.txt
@@ -73,6 +73,7 @@
 *****************************************************************************
 
 *** 16.1.5 ***
+- HAL: Removed unused macros in STM32F7xx and STM32F4xx hal_lld.h (bug #742).
 - HAL: Fixed Doxygen related macros in STM32F7xx, STM32L0xx and STM32L4xx
        lld files (bug #741).
 - HAL: Fixed bug in VREF enable/disable functions in ADCv3 driver