diff --git a/include/runtime_services/ffa_helpers.h b/include/runtime_services/ffa_helpers.h
index 91a7a6e..90bb30f 100644
--- a/include/runtime_services/ffa_helpers.h
+++ b/include/runtime_services/ffa_helpers.h
@@ -647,6 +647,9 @@
 	enum ffa_memory_type type, enum ffa_memory_cacheability cacheability,
 	enum ffa_memory_shareability shareability);
 
+void ffa_hypervisor_retrieve_request_init(struct ffa_memory_region *region,
+					  ffa_memory_handle_t handle);
+
 uint32_t ffa_memory_region_init(
 	struct ffa_memory_region *memory_region, size_t memory_region_max_size,
 	ffa_id_t sender, ffa_id_t receiver,
diff --git a/include/runtime_services/spm_common.h b/include/runtime_services/spm_common.h
index fc7ddd7..e9c845d 100644
--- a/include/runtime_services/spm_common.h
+++ b/include/runtime_services/spm_common.h
@@ -112,6 +112,9 @@
 		     ffa_id_t sender, ffa_id_t receiver,
 		     ffa_memory_region_flags_t flags, uint32_t mem_func);
 
+bool hypervisor_retrieve_request(struct mailbox_buffers *mb, uint64_t handle,
+				 void *out, uint32_t out_size);
+
 /**
  * Helper to conduct a memory relinquish. The caller is usually the receiver,
  * after it being done with the memory shared, identified by the 'handle'.