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-rw-r--r--os/hal/ports/STM32/STM32F4xx/hal_lld.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/os/hal/ports/STM32/STM32F4xx/hal_lld.c b/os/hal/ports/STM32/STM32F4xx/hal_lld.c
index 91e3c1367..69767e8c4 100644
--- a/os/hal/ports/STM32/STM32F4xx/hal_lld.c
+++ b/os/hal/ports/STM32/STM32F4xx/hal_lld.c
@@ -150,7 +150,11 @@ void stm32_clock_init(void) {
#if !STM32_NO_INIT
/* PWR clock enable.*/
+#if defined(HAL_USE_RTC) && defined(RCC_APB1ENR_RTCAPBEN)
+ RCC->APB1ENR = RCC_APB1ENR_PWREN | RCC_APB1ENR_RTCAPBEN;
+#else
RCC->APB1ENR = RCC_APB1ENR_PWREN;
+#endif
/* PWR initialization.*/
#if defined(STM32F4XX) || defined(__DOXYGEN__)