diff --git a/demos/STM32/RT-STM32L552ZE-NUCLEO144/cfg/mcuconf.h b/demos/STM32/RT-STM32L552ZE-NUCLEO144/cfg/mcuconf.h
index a70dd676a..ad55a04d8 100644
--- a/demos/STM32/RT-STM32L552ZE-NUCLEO144/cfg/mcuconf.h
+++ b/demos/STM32/RT-STM32L552ZE-NUCLEO144/cfg/mcuconf.h
@@ -38,7 +38,7 @@
 /*
  * Secure mode HAL settings.
  */
-#define STM32_SECURE_MODE                   TRUE
+#define STM32_SECURE_MODE                   FALSE
 
 /*
  * HAL driver global settings.