diff --git a/include/plat/arm/common/plat_arm.h b/include/plat/arm/common/plat_arm.h
index 95fc18e..846c9a4 100644
--- a/include/plat/arm/common/plat_arm.h
+++ b/include/plat/arm/common/plat_arm.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2020, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2021, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -152,6 +152,9 @@
 /* IO storage utility functions */
 int arm_io_setup(void);
 
+/* Set image specification in IO block policy */
+int arm_set_image_source(unsigned int image_id, const char *part_name);
+
 /* Security utility functions */
 void arm_tzc400_setup(uintptr_t tzc_base,
 			const arm_tzc_regions_info_t *tzc_regions);