diff --git a/include/common/bl_common.h b/include/common/bl_common.h
index 09a394d..c7c7487 100644
--- a/include/common/bl_common.h
+++ b/include/common/bl_common.h
@@ -233,6 +233,14 @@
 
 #endif /* LOAD_IMAGE_V2 */
 
+#if TRUSTED_BOARD_BOOT && defined(DYN_DISABLE_AUTH)
+/*
+ * API to dynamically disable authentication. Only meant for development
+ * systems.
+ */
+void dyn_disable_auth(void);
+#endif
+
 extern const char build_message[];
 extern const char version_string[];