diff --git a/plat/st/common/include/stm32mp_common.h b/plat/st/common/include/stm32mp_common.h
index cc06f5c..a13e9e5 100644
--- a/plat/st/common/include/stm32mp_common.h
+++ b/plat/st/common/include/stm32mp_common.h
@@ -21,6 +21,7 @@
 
 bool stm32mp_is_single_core(void);
 bool stm32mp_is_closed_device(void);
+bool stm32mp_is_auth_supported(void);
 
 /* Return the base address of the DDR controller */
 uintptr_t stm32mp_ddrctrl_base(void);