diff --git a/demos/ATSAMA5D2/RT-SAMA5D2-XPLAINED/mcuconf.h b/demos/ATSAMA5D2/RT-SAMA5D2-XPLAINED/mcuconf.h
index c633e5454..0827eda96 100644
--- a/demos/ATSAMA5D2/RT-SAMA5D2-XPLAINED/mcuconf.h
+++ b/demos/ATSAMA5D2/RT-SAMA5D2-XPLAINED/mcuconf.h
@@ -22,6 +22,7 @@
 /*
  * HAL driver system settings.
  */
+#define SAMA_HAL_IS_SECURE                  TRUE
 #define SAMA_NO_INIT                        FALSE
 #define SAMA_MOSCRC_ENABLED                 TRUE
 #define SAMA_MOSCXT_ENABLED                 FALSE
diff --git a/os/hal/ports/SAMA/SAMA5D2x/hal_lld.h b/os/hal/ports/SAMA/SAMA5D2x/hal_lld.h
index 7669ad25e..2144ea8fe 100644
--- a/os/hal/ports/SAMA/SAMA5D2x/hal_lld.h
+++ b/os/hal/ports/SAMA/SAMA5D2x/hal_lld.h
@@ -196,6 +196,15 @@
  * @name    Configuration options
  * @{
  */
+/**
+ * @brief   Defines if the code is running in the secure side of the ARM Trust
+ *          Zone. It must be @p TRUE whenever the code is compiled for the
+ *          secure side.
+ */
+#if !defined(SAMA_NO_INIT) || defined(__DOXYGEN__)
+#define SAMA_HAL_IS_SECURE                  TRUE
+#endif
+
 /**
  * @brief   Disables the PMC initialization in the HAL.
  */