diff --git a/demos/STM32/RT-STM32F407-DISCOVERY/halconf.h b/demos/STM32/RT-STM32F407-DISCOVERY/halconf.h
index e9a4d5f25..ab3a6629b 100644
--- a/demos/STM32/RT-STM32F407-DISCOVERY/halconf.h
+++ b/demos/STM32/RT-STM32F407-DISCOVERY/halconf.h
@@ -111,7 +111,7 @@
  * @brief   Enables the RTC subsystem.
  */
 #if !defined(HAL_USE_RTC) || defined(__DOXYGEN__)
-#define HAL_USE_RTC                 TRUE
+#define HAL_USE_RTC                 FALSE
 #endif
 
 /**