diff --git a/bsp/stm32/libraries/HAL_Drivers/drv_wdt.c b/bsp/stm32/libraries/HAL_Drivers/drv_wdt.c
index e937896703..473a03a72c 100644
--- a/bsp/stm32/libraries/HAL_Drivers/drv_wdt.c
+++ b/bsp/stm32/libraries/HAL_Drivers/drv_wdt.c
@@ -25,7 +25,7 @@ static rt_err_t wdt_init(rt_watchdog_t *wdt)
     hiwdg.Instance = IWDG;
     hiwdg.Init.Prescaler = IWDG_PRESCALER_32;
 
-    hiwdg.Init.Reload = 0x00000FFE;
+    hiwdg.Init.Reload = 0x00000FFF;
 #if defined(SOC_SERIES_STM32F0) || defined(SOC_SERIES_STM32L4) || defined(SOC_SERIES_STM32F7)
     hiwdg.Init.Window = 0x00000FFF;
 #endif