diff --git a/bl1/bl1_private.h b/bl1/bl1_private.h
index 0a8fc45..7d796f1 100644
--- a/bl1/bl1_private.h
+++ b/bl1/bl1_private.h
@@ -46,4 +46,5 @@
 void bl1_arch_setup(void);
 void bl1_arch_next_el_setup(void);
 
+void bl1_prepare_next_image(unsigned int image_id);
 #endif /* __BL1_PRIVATE_H__ */