diff --git a/lib/efi_loader/efi_runtime.c b/lib/efi_loader/efi_runtime.c
index 7a64dd4..9476556 100644
--- a/lib/efi_loader/efi_runtime.c
+++ b/lib/efi_loader/efi_runtime.c
@@ -424,7 +424,7 @@
  * @virtmap:		virtual address mapping information
  * Return:		status code EFI_UNSUPPORTED
  */
-static efi_status_t EFIAPI efi_set_virtual_address_map_runtime(
+static __efi_runtime efi_status_t EFIAPI efi_set_virtual_address_map_runtime(
 			unsigned long memory_map_size,
 			unsigned long descriptor_size,
 			uint32_t descriptor_version,