diff --git a/include/plat/common/platform.h b/include/plat/common/platform.h
index 9deb33d..7664509 100644
--- a/include/plat/common/platform.h
+++ b/include/plat/common/platform.h
@@ -307,6 +307,9 @@
  ******************************************************************************/
 int plat_get_cca_attest_token(uintptr_t buf, size_t *len,
 			       uintptr_t hash, size_t hash_size);
+int plat_get_cca_realm_attest_key(uintptr_t buf, size_t *len,
+				   unsigned int type);
+
 /*******************************************************************************
  * Optional BL31 functions (may be overridden)
  ******************************************************************************/