diff --git a/services/std_svc/drtm/drtm_main.h b/services/std_svc/drtm/drtm_main.h
index e2b2ca9..a7d053f 100644
--- a/services/std_svc/drtm/drtm_main.h
+++ b/services/std_svc/drtm/drtm_main.h
@@ -95,6 +95,7 @@
 	uint64_t dlme_addr_map_size;
 	uint64_t dlme_tpm_log_size;
 	uint64_t dlme_tcb_hashes_table_size;
+	uint64_t dlme_acpi_tables_region_size;
 	uint64_t dlme_impdef_region_size;
 } __aligned(__alignof(uint16_t /* First member's type, `uint16_t version'. */));