diff --git a/plat/st/common/include/stm32mp_shared_resources.h b/plat/st/common/include/stm32mp_shared_resources.h
index 2ab42ef..b148666 100644
--- a/plat/st/common/include/stm32mp_shared_resources.h
+++ b/plat/st/common/include/stm32mp_shared_resources.h
@@ -15,4 +15,7 @@
 /* Return true if and only if @reset_id relates to a non-secure peripheral */
 bool stm32mp_nsec_can_access_reset(unsigned int reset_id);
 
+/* Consolidate peripheral states and lock against new peripheral registering */
+void stm32mp_lock_periph_registering(void);
+
 #endif /* STM32MP_SHARED_RESOURCES_H */