diff --git a/include/acpi/actbl3.h b/include/acpi/actbl3.h
index 79d3aa5a4bad..7ca456e88377 100644
--- a/include/acpi/actbl3.h
+++ b/include/acpi/actbl3.h
@@ -238,6 +238,7 @@ struct acpi_srat_mem_affinity {
 #define ACPI_SRAT_MEM_ENABLED       (1)	/* 00: Use affinity structure */
 #define ACPI_SRAT_MEM_HOT_PLUGGABLE (1<<1)	/* 01: Memory region is hot pluggable */
 #define ACPI_SRAT_MEM_NON_VOLATILE  (1<<2)	/* 02: Memory region is non-volatile */
+#define ACPI_SRAT_MEM_SPEC_PURPOSE  (1<<3)	/* 03: Memory is intended for specific-purpose usage */
 
 /* 2: Processor Local X2_APIC Affinity (ACPI 4.0) */